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Name |
Patent Title |
Patent Number |
Residence |
Year Issued |
|---|---|---|---|---|
| Adams, David | Methods of O-demethylation | 11136331 | Charles City | 2021 |
| Adams, Charles | electrically controlled fluid motor | 2817317 | Charles City | 1957 |
| Angell, William | stanchion | 496390 | Charles City | 1893 |
| Angpap, Thomas | antigen for hemagglutination inhibition test | 3590116 | Charles City | 1971 |
| Babcock, Amos | device for converting motion | 285372 | Nora Springs | 1883 |
| Baltimore, John | swinging gate | 337360 | Nora Springs | 1886 |
| Baltimore, J. | cultivator | 72780 | Marble Rock | 1867 |
| Barney, Valentine | stone sawing machine | 377595 | Charles City | 1888 |
| Barney, Valentine | stone sawing machine | 377660 | Charles City | 1888 |
| Barney, Valentine | machine for sawing stone | 312068 | Charles City | 1885 |
| Barney, Valentine | sand and water pump | 312069 | Charles City | 1885 |
| Barney, Valentine | improvement in machines for dressing tiles | 5468 | Charles City | 1873 |
| Baron, Robert | nitro-trifluoromethl-benzanilides for treating coccidiosis | 3743745 | Charles City | 1973 |
| Baron, Robert | nitro-trifluoromethyl-benzanilides | 3689556 | Charles City | 1972 |
| Baron, Robert | coccidiosis control with quinolinol derivatives | 3636216 | Charles City | 1972 |
| Baron, Robert | nitro-trifluoromethylthiobenzamides | 3555085 | Charles City | 1971 |
| Baron, Robert | compositions and a method for the prevention and control of histomoniasis which employ a 5-nitroimidazole and a benzenearsonic acid | 3439097 | Charles City | 1969 |
| Baron, Robert | ortho-nitrobenzoic acid, 5-nitrofurfurylidene hydrazide | 3376296 | Charles City | 1968 |
| Baron, Robert | nitrofuran derivatives for treating coccidiosis | 3330724 | Charles City | 1967 |
| Bartz, Thomas | single direction toggle anchor | 5215418 | Charles City | 1993 |
| Bauer, Michael | Methods and compositions for preparing lisdexamfetamine and salts thereof | 8779191 | Charles City | 2014 |
| Becicka, Brian | Process for preparing anhydrous Aripirazole type I | 8039621 | Charles City | 2011 |
| Bedell, Amelia | hog feeder | 1176193 | Marble Rock | 1916 |
| Belanski, Charles | ironing board and plaiting machine | 344805 | Nora Springs | 1886 |
| Benson, Wayne | hair cutting device | 2915070 | Rudd | 1959 |
| Berndt, Edward | coccidiosis control with quinolinol derivatives | 3636216 | Charles City | 1972 |
| Berndt, Edward | composition for treating histomoniasis in poultry | 3621095 | Charles City | 1971 |
| Berndt, Edward | 3,5-dinitrosalicylic acid, 5-nitrofurfuryli-dene hydrazide and compostions containing and methods employing the same for the control of histomoniasis | 3424845 | Charles City | 1969 |
| Berndt, Edward | process of separating arsanilic acid | 3296290 | Charles City | 1967 |
| Berndt, Edward | process of preparing 2-aminoquinoxaline | 3260720 | Charles City | 1966 |
| Bloom, Nicklas | bob sleigh | 390747 | Charles City | 1888 |
| Bloom, Joseph | bob sleigh | 390747 | Charles City | 1888 |
| Bloom, Joseph | running gear for vehicles | 382406 | Charles City | 1888 |
| Bloom, Nicklas | running gear for vehicles | 382406 | Charles City | 1888 |
| Bloom, Nicklas | spring for vehicles | 346085 | Charles City | 1886 |
| Boerschel, Bruce | Vehicle outside door handle | D674678 | Charles City | 2013 |
| Boerschel, Bruce | Vehicle inside door handle | D676304 | Charles City | 2013 |
| Boerschel, Bruce | door latch handle | 529367 | Charles City | 2006 |
| Boggess, Gregory | field bag boost vaccination delivery system | 5884583 | Charles City | 1999 |
| Bolinski, Eric | Wheeled device to assist in carrying ladders | 8556277 | Charles City | 2013 |
| Bolstad, Gustav | anti-overturning device for vehicles | 2950365 | Charles City | 1960 |
| Borsheim, Hans | washing machine | 1682212 | Charles City | 1928 |
| Bradshaw, Ray | spring tooth mounting | 1743592 | Charles City | 1930 |
| Brayton, William | gate | 454026 | Floyd | 1891 |
| Briggs, Robert | bit | 659286 | Rudd | 1900 |
| Brown, Albert | door check | 943515 | Rockford | 1909 |
| Brunsting, Edwin | coccidiosis control with quinolinol derivatives | 3636216 | Charles City | 1972 |
| Bucklen, Willard | respirator | 913688 | Marble Rock | 1909 |
| Buenger, Greg | Method of making piperidine derivatives | 8299258 | Charles City | 2012 |
| Buenger, Greg | Method of making amphetamine | 7705184 | Charles City | 2010 |
| Burton, Frank | thill coupling | 437564 | Charles City | 1890 |
| Callen, Gary | Methods and compositions for preparing lisdexamfetamine and salts thereof | 8779191 | Charles City | 2014 |
| Carr, George | frame for doors or windows | 706157 | Carrville | 1902 |
| Carr, George | paper hanger | 479971 | Carrville | 1892 |
| Carr, George | hay and grain rack | 401733 | Charles City | 1889 |
| Chism, William | nut lock | 1252088 | Charles City | 1918 |
| Clark, Henry | wrench | 869206 | Charles City | 1907 |
| Cole, William | combined door hanger and track for edgewise movable doors | 1004746 | Charles City | 1911 |
| Cole, William | disk harrow | 906692 | Charles City | 1908 |
| Conner, Bernard | can holder | 2074212 | Rudd | 1937 |
| Crawford, Trevor | set tool and cap | 5711043 | Charles City | 1998 |
| Crawford, Danny | newspaper vending unit | 5363987 | Charles City | 1994 |
| Crawford, Dan | anchor set tool | 5038435 | Charles City | 1991 |
| Crawford, Danny | pin drive anchor with locking sleeve | 4917552 | Charles City | 1990 |
| Crawford, Danny | anchor set tool | 4954025 | Charles City | 1990 |
| Crocker, Howard | intermittent driving mechanism | 1167337 | Nora Springs | 1916 |
| Czarny, Mike | purification of hydroxyphenyl alkanes | 5202505 | Charles City | 1993 |
| Daily, Floyd | clamp for connecting an insulator to a post | 2222810 | Nora Springs | 1940 |
| Daley, Michael | hand cart | 779913 | Charles City | 1905 |
| Daley, Michael | cleaning attachment for disk harrows or the like | 785596 | Charles City | 1905 |
| Daley, Michael | speed regulator for explosion engines | 776118 | Charles City | 1904 |
| Daley, Michael | barrel truck | 650374 | Charles City | 1900 |
| Daley, Walter | cleaner for disk harrows | 507312 | Charles City | 1893 |
| Davis, Dustin | Catwalk floorbeam connection system | 10975584 | Nora Springs | 2021 |
| Dean, Daniel | cow hopple | 664838 | Rudd | 1901 |
| Decker, Carl | windmill pump coupling | 750173 | Charles City | 1904 |
| Decker, Carl | pump coupling | 772311 | Charles City | 1904 |
| Decker, Carl | windmill pump coupling | 774939 | Charles City | 1904 |
| Devore, James | process for catalytically hydrogenating phytosterols | 6673951 | Charles City | 2004 |
| Dietrich, Bruce | inhalation therapy enclosure for small animals | 7438021 | Charles City | 2008 |
| Dietrich, Bruce | versa cage system | 5168829 | Charles City | 1992 |
| Doll, Theodore | furniture caster | 1007022 | Nora Springs | 1911 |
| Doll, Theodore | furniture caster | 1009388 | Nora Springs | 1911 |
| Doll, Theodore | furniture caster | 1009389 | Nora Springs | 1911 |
| Dommell, Homer | electrically controlled fluid motor | 2817317 | Charles City | 1957 |
| Dong, Zhiming | Process for preparing hydromorphone and derivatives thereof | 10370382 | Charles City | 2019 |
| Dong, Zhiming | Process for the formation of hydrocodone bitatrate | 9981979 | Charles City | 2018 |
| Douglas, Jason | Methods and compositions for preparation of amphetamine conjugates and salts thereof | 8614346 | Charles City | 2013 |
| Douglas, Jason | Method of making amphetamine | 7705184 | Charles City | 2010 |
| Douglas, Jason | process for preparation of probucol derivatives | 7345191 | Charles City | 2008 |
| Douglas, Jason | process for preparation of probucol derivatives | 7294736 | Charles City | 2007 |
| Dreher, Carl | grocer's scoop | 2563223 | Nora Springs | 1951 |
| Dreher, Carl | scoop | 1728858 | Nora Springs | 1929 |
| Dreher, Carl | store counter | 1583676 | Nora Springs | 1926 |
| Dumbolton, Charles | thrasher | 1592186 | Rockford | 1926 |
| Durrwachter, Robert | Process for the synthesis of 4,5,6,7-tetrachloro-3?,6?-dihydroxy-2?, 4?, 5?7?-tetraiodo-3H-spiro[isobenzofuran-1,9?-xanthen]-3-one (Rose Bengal) and related xanthenes | 9273022 | Charles City | 2016 |
| Durrwachter, J. | process for preparing oximidazoles | 5910595 | Charles City | 1999 |
| Eek, Margus | Methods of O-demethylation | 11136331 | Charles City | 2021 |
| Eggen, Oscar | device for synchronizing the speed of a vehicle with the steering mechanism thereof | 1902626 | Charles City | 1933 |
| Eklund, Lars | Methods of O-demethylation | 11136331 | Charles City | 2021 |
| Elliot, John | sheaf carrier | 284400 | Rudd | 1883 |
| Elliott, Charles | sheaf carrier | 379212 | Rockford | 1888 |
| Elliott, George | sheaf carrier | 379212 | Rockford | 1888 |
| Eriksen, Sivert | fowl vaccinator | 2359550 | Charles City | 1944 |
| Ethington, Bradley | Crane assembly | 10221048 | Rudd | 2019 |
| Ethington, Bradley | Crane assembly | 9938121 | Rudd | 2018 |
| Ethington, Bradley | Crane assembly | 9033165 | Rudd | 2015 |
| Ethington, Brad | Anti-two block system for a crane assembly | 8813981 | Rudd | 2014 |
| Ethington, Bradley | Shear plate mounting system | 7896606 | Rudd | 2011 |
| Ethington, Bradley | tire servicing tool | 6321818 | Rudd | 2001 |
| Everett, Alexander | Compression mount paddle handle | 10024085 | Charles City | 2018 |
| Everett, Alexander | Free floating paddle actuation system | 8881564 | Charles City | 2014 |
| Everett, Alexander | Door handle with paddle actuator | D694087 | Charles City | 2013 |
| Fairbanks, Webster | plow | 377296 | Charles City | 1888 |
| Feenders, Harm | clod crusher and drag | 181427 | Charles City | 1876 |
| Feenders, Harm | clod crusher | 148879 | Charles City | 1874 |
| Ferguson, John | cow tail holder | 417715 | Charles City | 1889 |
| Ferguson, Charles | railway track gage, level, and gradient | 329895 | Charles City | 1885 |
| Flint, John | composition for shock treatment | 4490391 | Charles City | 1984 |
| Fockler, Jerry | process of separating arsanilic acid | 3296290 | Charles City | 1967 |
| Fowle, Leonard | harrow | 628785 | Rudd | 1899 |
| Frank, Dale | package for frangible articles | 3716133 | Charles City | 1973 |
| Frevert, Albert | carbureter | 1242432 | Charles City | 1917 |
| Girkin, Scott | security head anchor | 5221167 | Charles City | 1993 |
| Gisleson, William | sun visor attachment | 2377225 | Charles City | 1945 |
| Gleason, Stephen | latch structure | 6695361 | Charles City | 2004 |
| Gleason, Stephen | universal actuator assembly for a door latch | 6629711 | Charles City | 2003 |
| Gleason, Stephen | latch and actuator assembly with no-lock-out feature | 6494506 | Charles City | 2002 |
| Gleason, Stephen | control mechanism for operating a latch | 6231091 | Charles City | 2001 |
| Gleason, Stephen | sealed latch assembly | 5299844 | Charles City | 1994 |
| Gleason, Stephen | lock assembly | 5360244 | Charles City | 1994 |
| Gleason, Stephen | door latch handle | 339049 | Charles City | 1993 |
| Gleason, Stephen | door latch handle | 339050 | Charles City | 1993 |
| Gleason, Stephen | door closure assembly | 5127686 | Charles City | 1992 |
| Gleason, Stephen | paddle latch assembly | 5042853 | Charles City | 1991 |
| Gore, Thomas | dna encoding an antigenic protein derived from eimeria tenella and vaccines for prevention of coccidiosis caused by eimeria tenella | 5187080 | Charles City | 1993 |
| Gore, Thomas | antigenic proteins and vaccines containing them for prevention of coccidiosis caused by eimeria eimeria necatrix and eimeria tenella | 5028694 | Charles City | 1991 |
| Gore, Thomas | dna encoding an antigenic protein derived from eimeria tenella and vaccinesfor prevention of coccidiosis caused by eimeria tenella | 4874705 | Charles City | 1989 |
| Graf, Christopher | lens | 1293086 | Charles City | 1919 |
| Gratias, Earl | mixer | 2515555 | Nora Springs | 1950 |
| Green, Harry | 1-(4' -diazoniumphenyl)-pyridinium salts and the process of preparation | 3985724 | Charles City | 1976 |
| Green, Jerry | producing ornamental surfaces | 467229 | Nora Springs | 1892 |
| Haas, William | gate | 407951 | Charles City | 1889 |
| Haas, William | gate | 402439 | Charles City | 1889 |
| Haas, William | twine and wire cutter | 334582 | Charles City | 1886 |
| Haley, William | mail delivering apparatus | 834798 | Floyd | 1906 |
| Haley, William | hay loader | 440105 | Floyd | 1890 |
| Hall, Gene | newspaper vending unit | 5363987 | Charles City | 1994 |
| Hall, George | trace holding attachment for home clips | 287826 | Nora Springs | 1883 |
| Hall, George | ointment | 279940 | Nora Springs | 1883 |
| Hall, George | trace support | 284843 | Nora Springs | 1883 |
| Hansen, Christian | sectional pipe, conduit, or culvert unit | 1683544 | Charles City | 1928 |
| Hansen, Christian | excavating apparatus | 1479806 | Charles City | 1924 |
| Hansen, Christian | excavating apparatus | 1490387 | Charles City | 1924 |
| Hansen, Christian | scale | 1497017 | Charles City | 1924 |
| Harnish, Franklin | middlings separator | 185526 | Nora Springs | 1876 |
| Harr, John | beating and mixing machine | 1090148 | Nora Springs | 1914 |
| Harr, John | display rack | 1044381 | Nora Springs | 1912 |
| Harr, John | wall paper display rack | 983439 | Nora Springs | 1911 |
| Hart, Charles | harvesting grain | 1458936 | Charles City | 1923 |
| Hart, Charles | carbureter | 1137135 | Charles City | 1915 |
| Hart, Charles | steering wheel for traction vehicles | 950045 | Charles City | 1910 |
| Hart, Charles | clutch | 926184 | Charles City | 1909 |
| Hart, Charles | clutch | 926184 | Charles City | 1909 |
| Hart, Charles | cylinder cooling system for internal combustion | 774752 | Charles City | 1904 |
| Hart, Loren | mop wringer and brush | 731680 | Nora Springs | 1903 |
| Hart, Loren | washing machine | 679147 | Nora Springs | 1901 |
| Hart, Albert | washing machine | 589084 | Nora Springs | 1897 |
| Hart, Loren | washing machine | 589084 | Nora Springs | 1897 |
| Hartman, Stephen | attachment for sickle bars | 777093 | Charles City | 1904 |
| Hartman, Stephen | harrow | 339408 | Charles City | 1886 |
| Hartman, Daniel | spring guard for legs of furniture | 114812 | Charles City | 1871 |
| Hausberg, Ernest | tooth paste dispensing device | 1742536 | Charles City | 1930 |
| Hausberg, Ernest | electrically operated typewriter | 1328736 | Charles City | 1920 |
| Hausberg, Ernest | electrically operated type writer | 1200105 | Charles City | 1916 |
| Hausberg, Ernest | electrically operated type writer | 1209961 | Charles City | 1916 |
| Hedges, Ralph | protractor guide for bending pipes | 3200505 | Floyd | 1965 |
| Held, Byron | 1-(4' -diazoniumphenyl)-pyridinium salts and the process of preparation | 3985724 | Charles City | 1976 |
| Helton, Craig | latch assembly for movable closure element | 7309087 | Charles City | 2007 |
| Helton, Craig | round door handle | 541129 | Charles City | 2007 |
| Helton, Craig | latch assembly for movable closure element | 7097216 | Charles City | 2006 |
| Helton, Craig | operating handle for a closure element | 501783 | Charles City | 2005 |
| Helton, Craig | operating handle for a closure element | 506377 | Charles City | 2005 |
| Helton, Craig | holding assembly for movable closure element with releasably connected first and second linked elements | 6694675 | Charles City | 2004 |
| Helton, Craig | graspable portion of window hold open mechanism | 443195 | Charles City | 2001 |
| Hendrix, Raymond | Actuator mechanism for door latch | 9151091 | Charles City | 2015 |
| Henry, Jack | taeniacide | 2320630 | Charles City | 1943 |
| Henry, Jack | taeniacide for poultry | 2245530 | Charles City | 1941 |
| Heotis, James | coccidiostatic remedies | 2879201 | Charles City | 1959 |
| Herring, George | gate | 248040 | Charles City | 1881 |
| Herrington, John | trace buckle | 327166 | Charles City | 1885 |
| Hestness, Mark | horizontally polarized omni-directional antenna | 7006051 | Nora Springs | 2006 |
| Hewett, J. | compound and process of removing incrustations of lime from steam boilers | 110463 | Nora Springs | 1870 |
| Hicok, Gaylen | loader bucket orientation indicator | 7430983 | Charles City | 2008 |
| Hicok, Gaylen | fluid deceleration/de-aeration device | 7255730 | Charles City | 2007 |
| Hicok, Gaylen | adapter for use with a funnel | 7013934 | Charles City | 2006 |
| Hildebrand, Elbert | lock for automobile and other doors | 1848528 | Charles City | 1932 |
| Hill, Roselia | tension for warp reels and handlooms | 975618 | Charles City | 1910 |
| Hill, Cornelia | machinery for winding warp | 459784 | Floyd | 1891 |
| Hjelm, George | hinge construction for vehicle hoods | 2218384 | Charles City | 1940 |
| Hladky, Wallace | process of separating arsanilic acid | 3296290 | Charles City | 1967 |
| Hoag, Elwyn | bag holder | 626701 | Charles City | 1899 |
| Hoar, William | rock drills | 156733 | Floyd | 1874 |
| Hoar, William | spring hinge | 142392 | Floyd | 1873 |
| Hob, David | portable grain elevator | 809373 | Nora Springs | 1906 |
| Hof, David | washing machine | 998901 | Nora Springs | 1911 |
| Hoffmann, Hermann | 1-(4' -diazoniumphenyl)-pyridinium salts and the process of preparation | 3985724 | Charles City | 1976 |
| Hoffmann, Hermann | production of arsanilic acid | 3763201 | Charles City | 1973 |
| Holmberg, Par | Methods of O-demethylation | 11136331 | Charles City | 2021 |
| Holmberg, Pär | Process for preparing hydromorphone and derivatives thereof | 10370382 | Charles City | 2019 |
| Holmberg, Par | Preparation of saturated ketone morphinan compounds by catalytic isomerisation | 9981978 | Charles City | 2018 |
| Hop, Jacob | windmill | 361157 | Nora Springs | 1887 |
| Hop, John | windmill | 361157 | Nora Springs | 1887 |
| Howard, Harlan | corn planter | 319254 | Charles City | 1885 |
| Howard, Harlan | harrow | 273535 | Charles City | 1883 |
| Howard, Harlan | harrow | 263520 | Charles City | 1882 |
| Howard, Harlan | harrow tooth | 265084 | Charles City | 1882 |
| Hubbard, Francis | spring seat | 188140 | Nora Springs | 1877 |
| Hummel, William | sealer | 1506640 | Floyd | 1924 |
| Humphrey, Judi | Methods and compositions for preparing lisdexamfetamine and salts thereof | 8779191 | Charles City | 2014 |
| Hutches, Ira | fanning mill | 251443 | Marble Rock | 1881 |
| Jandl, Mary | corn crib | 1762019 | Marble Rock | 1930 |
| Janke, Ewald | plow | 2364367 | Charles City | 1944 |
| Jass, Paul | Method of making piperidine derivatives | 8299258 | Charles City | 2012 |
| Jass, Paul | Method of making amphetamine | 7705184 | Charles City | 2010 |
| Jass, Paul | process for preparation of probucol derivatives | 7345191 | Charles City | 2008 |
| Jass, Paul | process for the preparation of probucol derivatives | 7247744 | Charles City | 2007 |
| Jass, Paul | process for preparation of probucol derivatives | 7294736 | Charles City | 2007 |
| Jass, Paul | stereoselective reductive amination of ketones | 6468781 | Charles City | 2002 |
| Jass, Paul | substituted alkylketo compounds and process | 6486331 | Charles City | 2002 |
| Jass, Paul | process for preparing probucol derivatives | 6323359 | Charles City | 2001 |
| Jass, Paul | preparation of (s)-2-amino-6,6-dimethoxyhexanoic acid methyl ester via novel dioxolanes | 6329542 | Charles City | 2001 |
| Jass, Paul | preparation of (s)-2-amino-6,6-dimethoxyhexanoic acid methyl ester via novel dioxolanes | 6248882 | Charles City | 2001 |
| Jass, Paul | stereoselective reductive amination of ketones | 6140088 | Charles City | 2000 |
| Jass, Paul | preparation of [4s-(4.alpha.,7.alpha.,10a.beta.)]-4-amino-octahydro-5-oxo-7h-pyrido[2,1 -b] [1,3]thiazepine-7-carboxylic acid, methyl ester and salts thereof via novel disulfides | 6162913 | Charles City | 2000 |
| Jendro, Dennis | newspaper vending unit | 5363987 | Charles City | 1994 |
| Johannsen, John | grain cleaning apparatus | 4312750 | Rockford | 1982 |
| Johnson, Hjalmer | fishing lure | 2722079 | Rudd | 1955 |
| Johnson, Homer | talking machine | 769696 | Charles City | 1904 |
| Judson, Alfred | trace carrier | 322380 | Floyd | 1885 |
| Julian, William | disk sharpener | 754455 | Charles City | 1904 |
| Kalke, Henry | side lift for side dumping wagons | 4050593 | Nora Springs | 1977 |
| Kalke, Henry | grain screen and spreader | 3361258 | Rockford | 1968 |
| Kalke, Henry | apparatus for stirring grain and similar particulate material | 3156541 | Rockford | 1964 |
| Kellogg, Hiram | vehicle wheel | 134894 | Floyd | 1873 |
| Kelly, George | washing machine | 1706405 | Charles City | 1929 |
| Kerr, Kathel | nematocidal compositions and method | 3203859 | Charles City | 1965 |
| Kerr, Kathel | veterinary tetravalent tin compositions | 2702775 | Charles City | 1955 |
| Kerr, Kathel | veterinary tetravalent tin compositions | 2702776 | Charles City | 1955 |
| Kerr, Kathel | veterinary tetravalent tin compositions | 2702777 | Charles City | 1955 |
| Kerr, Kathel | veterinary tetravalent tin compositions | 2702778 | Charles City | 1955 |
| Ketterling, Edwin | power take-off control valve | 3669229 | Charles City | 1972 |
| Kielsmeier, Henry | hog waterer | 1528435 | Charles City | 1925 |
| King, Stanley | portable truck elevator | 2519478 | Charles City | 1950 |
| Kinscella, Samuel | reverse gear for engines | 689313 | Nora Springs | 1901 |
| Klages, John | draft equalizer | 1122949 | Rockford | 1914 |
| Koebler, William | package for frangible articles | 3716133 | Charles City | 1973 |
| Krueger, Hermann | automatic tractor hitch | 1646253 | Niles Township | 1927 |
| LaDue, S. | calendar clock | 25468 | Rockford | 1859 |
| Ladwig, Charles | washing machine | 951951 | Nora Springs | 1910 |
| Ladwig, Charles | portable grain elevator | 809373 | Nora Springs | 1906 |
| Larchar, Lewis | railway track clearer | 309632 | Marble Rock | 1884 |
| Larchar, Lewis | snow plow | 264542 | Marble Rock | 1882 |
| Law, Basil | hammer for removing gates or risers from castings | 5407017 | Charles City | 1995 |
| Lehman, David | broadcast seeder and planter | 435757 | Rockford | 1890 |
| Letourneau, Michael | Methods of O-demethylation | 11136331 | Charles City | 2021 |
| Lewis, Alvin | feed trough | 555781 | Nora Springs | 1896 |
| Lipp, Dale | automobile mounted multiple bike and ski racks | 5476202 | Nora Springs | 1995 |
| Lipps, John | hame attachment | 389520 | Rockford | 1888 |
| Lipps, John | leather rounding machine | 393788 | Rockford | 1888 |
| Littell, William | planter and roller | 367006 | Charles City | 1887 |
| Lottridge, William | grain binder | 107933 | Charles City | 1870 |
| Lottridge, William | grain binder | 93458 | Charles City | 1869 |
| Martin, Thomas | air intake for air cleaners | 2197503 | Charles City | 1940 |
| Martin, Earl | hay rack removing appliance | 1071935 | Charles City | 1913 |
| Matheson, Archibald | transmission gear | 1177880 | Rockford | 1916 |
| Matisheck, Peter | antigen for hemagglutination inhibition test | 3590116 | Charles City | 1971 |
| Matisheck, Peter | vaccine against avian respiratory infection | 2998349 | Charles City | 1961 |
| Mayfield, Orley | method of treating animals infected with large roundworms using cobalt arsenic compounds | 3466363 | Charles City | 1969 |
| Mayfield, Orley | composition for control of poultry coccidiosis | 2449080 | Charles City | 1948 |
| Mayfield, Orley | composition for control of poultry coccidiosis | 2449081 | Charles City | 1948 |
| Mayfield, Orley | poultry treatment composition | 2450866 | Charles City | 1948 |
| Mayfield, Orley | taeniacide | 2320630 | Charles City | 1943 |
| Mayfield, Orley | taeniacide for poultry | 2245530 | Charles City | 1941 |
| Mayfield, Orley | treatment of range paralysis | 2173440 | Charles City | 1939 |
| McCray, Harold | carbureter | 1153436 | Charles City | 1915 |
| McFarland, Wayne | method for mining and reclaiming land | 4462713 | Charles City | 1984 |
| McGuire, Willis | methyl-phenyl-arsonic acid blackhead control compositions | 2815313 | Charles City | 1957 |
| McGuire, Willis | paranitro-phenyl-arsonic acid blackhead control composition | 2638432 | Charles City | 1953 |
| McPhail, James | grain fan | 100434 | Charles City | 1870 |
| McPhail, James | bag holder | 96941 | Charles City | 1869 |
| Mead, Harold | versatile fast hitch side mounting of agricultural spray tanks | 4351535 | Charles City | 1982 |
| Mead, Harold | agricultural applicator apparatus | 4302904 | Charles City | 1981 |
| Mead, Harold | grain bin floor support system | 4282694 | Charles City | 1981 |
| Mead, Harold | tank mounting apparatus for tractors | 4162796 | Charles City | 1979 |
| Mead, Harold | prefabricated wire panel enclosure | 3095855 | Charles City | 1963 |
| Meler, August | earth auger | 570810 | Marble Rock | 1896 |
| Merfeld, Peter | folding stool | 1281189 | Marble Rock | 1918 |
| Merriman, Amasa | attachment for type writing machines | 525916 | Charles City | 1894 |
| Mewman, Karel | antigenic proteins and vaccines containing them for prevention of coccidiosis caused by eimeria eimeria necatrix and eimeria tenella | 5028694 | Charles City | 1991 |
| Michalson, Erik | Method of making amphetamine | 7705184 | Charles City | 2010 |
| Michalson, Erik | process for catalytically hydrogenating phytosterols | 6673951 | Charles City | 2004 |
| Michalson, Erik | process for preparing piperazine-substituted aliphatic carboxylates | 6265579 | Charles City | 2001 |
| Michalson, Erik | process for preparing piperazine-substituted aliphatic carboxylates | 6239277 | Charles City | 2001 |
| Mitchell, William | concrete pipe making machine | 4957424 | Charles City | 1990 |
| Mohler, James | aircraft propeller | 2167050 | Charles City | 1939 |
| Moore, Margaret | bed pan | 890681 | Marble Rock | 1908 |
| Morehouse, Neal | veterinary composition containing halo-nitro-benzamides and methods of using same | 3161564 | Charles City | 1964 |
| Morehouse, Neal | coccidiostatic remedies | 2879201 | Charles City | 1959 |
| Morehouse, Neal | methyl-phenyl-arsonic acid blackhead control compositions | 2815313 | Charles City | 1957 |
| Morehouse, Neal | N,N'-(3-nitro-benzene-sulfonyl) ethylene-diamine compositions for the treatment of coccidiosis | 2715600 | Charles City | 1955 |
| Morehouse, Neal | paranitro-phenyl-arsonic acid blackhead control composition | 2638432 | Charles City | 1953 |
| Morehouse, Neal | composition for control of poultry coccidiosis | 2476890 | Charles City | 1949 |
| Morehouse, Neal | composition for control of poultry coccidiosis | 2449080 | Charles City | 1948 |
| Morehouse, Neal | composition for control of poultry coccidiosis | 2449081 | Charles City | 1948 |
| Morehouse, Neal | poultry treatment composition | 2450866 | Charles City | 1948 |
| Morey, Charles | rein holder | 839174 | Floyd | 1906 |
| Mosher, Glenn | removable window for closed cars | 1686705 | Rockford | 1928 |
| Mullenbach, William | cam actuated adjustable mold clamp | 2581040 | Charles City | 1952 |
| Mumm, Bret | adaptive battery charger with universal interface plate | 5818197 | Nora Springs | 1998 |
| Nakaue, Harry | Alpha, Alpha, Alpha-trifluoro-6-substituted-5-nitro-toluic acid, 5-nitrofurfurylidene hydrazide compounds as growth promotants | 3773943 | Charles City | 1973 |
| Nakaue, Harry | alpha, alpha, alpha-trifluoro-6-substituted-5-nitro-5-toluic acid, 5-nitrofurfurylidene hydrazide compounds | 3642784 | Charles City | 1972 |
| Nelson, Danny | newspaper vending unit | 5363987 | Charles City | 1994 |
| Nelson, Albert | sawing apparatus | 1198371 | Rockford | 1916 |
| Olson, Harry | flag standard | 2263138 | Nora Springs | 1941 |
| Otis, Nathaniel | lightning rod | 92638 | Charles City | 1869 |
| Ott, Stanley | vehicle ski rack | 327043 | Marble Rock | 1992 |
| Ott, Stanley | vehicle trailer hitch adapted bicycle carrier | 314543 | Marble Rock | 1991 |
| Paddleford, John | swinging gate | 337360 | Nora Springs | 1886 |
| Parsons, John | corn planter | 111774 | Charles City | 1871 |
| Pegler, John | wrench | 1280533 | Charles City | 1918 |
| Petersen, Gary | antigenic proteins and vaccines containing them for prevention of coccidiosis caused by eimeria eimeria necatrix and eimeria tenella | 5028694 | Charles City | 1991 |
| Peterson, Oliver | method of controlling odor | 3706663 | Charles City | 1972 |
| Peterson, Oliver | vaccine against avian respiratory infection | 2998349 | Charles City | 1961 |
| Peterson, Oliver | method of treating air sac infection in poultry with para-amino-benzoate composition | 2748051 | Charles City | 1956 |
| Peterson, Oliver | chemotherapeutic preparation | 2480104 | Charles City | 1949 |
| Peterson, Henry | storage battery | 1012908 | Charles City | 1911 |
| Petzold, Edgar | process for producing sugars from starch | 3236687 | Charles City | 1966 |
| Pitts, Hanover | cloth measuring machine | 597824 | Nora Springs | 1898 |
| Pitts, Hanover | ironing board and plaiting machine | 344805 | Nora Springs | 1886 |
| Powers, William | drain | 1051757 | Charles City | 1913 |
| Prunty, Robert | control valve for hydraulic actuator | 3035610 | Charles City | 1962 |
| Radloff, William | carbureter | 1176600 | Charles City | 1916 |
| Radloff, William | automatic governor | 302426 | Rudd | 1884 |
| Raymond, Peter | railway switch | 114196 | Charles City | 1871 |
| Refsnider, Winfield | mold for hollow concrete blocks | 1181035 | Charles City | 1916 |
| Rex, Rudolph | bird trap | 49923 | Charles City | 1865 |
| Roberts, Thomas | leather rounding machine | 393788 | Rockford | 1888 |
| Rogge, Douglas | anchor set tool | 5038435 | Charles City | 1991 |
| Rogge, Doug | anchor set tool | 4954025 | Charles City | 1990 |
| Rolph, Dennis | set tool and cap | 5711043 | Charles City | 1998 |
| Rolph, Dennis | wall anchor | 5743061 | Charles City | 1998 |
| Rolph, Dennis | newspaper vending unit | 5363987 | Charles City | 1994 |
| Ronayne, Ronald | power take-off control valve | 3669229 | Charles City | 1972 |
| Rottinghaus, Vince | Heating system for heating fluid in a tank | 9719729 | Charles City | 2017 |
| Rottinghaus, Vince | ground heating device | 7441986 | Charles City | 2008 |
| Ruhl, Charles | fluid lift mechanism | 2707867 | Charles City | 1955 |
| Rumsey, Reed | vaccine against avian respiratory infection | 2998349 | Charles City | 1961 |
| Runnels, Paul | borrelia burgdorferi bacterin | 6316005 | Floyd | 2001 |
| Russell, Jerome | carbureter | 1148461 | Rudd | 1915 |
| Russell, Jerome | carbureter | 1044576 | Rudd | 1912 |
| Sadler, John | adjustable tongue hound | 1503712 | Rockford | 1924 |
| Schaper, Walter | device for guiding horses | 1062508 | Charles City | 1913 |
| Schaper, William | device for guiding horses | 1062508 | Charles City | 1913 |
| Schiesher, Matthew | Methods and compositions for preparing lisdexamfetamine and salts thereof | 8779191 | Charles City | 2014 |
| Schiesher, Matthew | Methods and compositions for preparation of amphetamine conjugates and salts thereof | 8614346 | Charles City | 2013 |
| Schiesher, Matthew | Method of making amphetamine | 7705184 | Charles City | 2010 |
| Schmidtke, Edward | elevator conveyor | 2773586 | Marble Rock | 1956 |
| Schmidtke, Edward | wagon bolster jack | 2467056 | Charles City | 1949 |
| Schnarr, Henry | shank protector | 398453 | Nora Springs | 1889 |
| Schnarr, Henry | combined heel plate and counter support | 291943 | Nora Springs | 1884 |
| Schneider, John | oil holder | 1620294 | Charles City | 1927 |
| Schneider, Conrad | wind power | 172784 | Charles City | 1876 |
| Schneider, Conrad | shingle gage | 165880 | Charles City | 1875 |
| Schnieder, John | loading machine | 1090418 | Charles City | 1914 |
| Schutz, Kezia | Method of making piperidine derivatives | 8299258 | Charles City | 2012 |
| Scofield, John | planter and roller | 367006 | Charles City | 1887 |
| Secoy, Genevieve | sweeping compound | 1600515 | Charles City | 1926 |
| Sellon, Clarence | combined post and fence wire fastening device | 917166 | Rudd | 1909 |
| Semm, Charles | vehicle coupling | 751692 | Carrville | 1904 |
| Semm, Fred | pump attachment | 712010 | Charles City | 1902 |
| Sheets, John | chimney top and ventilator | 299175 | Nora Springs | 1884 |
| Shook, Kenneth | simplified nonplugging pump water closet | 2580134 | Marble Rock | 1951 |
| Siefken, Otto | automobile radiator | 1558205 | Rockford | 1925 |
| Slagle, Dean | separation of isomeric mixtures of nitroanilines | 2671110 | Charles City | 1954 |
| Smith, Darwin | Fish-grabbing tool | 9357758 | Rockford | 2016 |
| Smith, Bruce | closeable weatherproof blanket for children | 259531 | Charles City | 1981 |
| Soone, Alo | Methods of O-demethylation | 11136331 | Charles City | 2021 |
| Stanley, William | animal ringer | 1892639 | Charles City | 1932 |
| Staudt, Arnold | tree anchoring device | 4299052 | Marble Rock | 1981 |
| Steinkamp, Frederick | detachable streamer means for use in playing touch football | 3063718 | Charles City | 1962 |
| Stewart, Milford | brake equalizer | 2443331 | Charles City | 1948 |
| Stille, Larry | moisture monitor system and method for combine harvester | 5106339 | Rockford | 1992 |
| Stille, Larry | grain dryer control system and method using moisture sensor | 5144755 | Rockford | 1992 |
| Stille, Larry | grain dryer control system and method using moisture sensor | 4916830 | Rockford | 1990 |
| Stille, Larry | apparatus for controlling power delivery to a grain stirring device | 4374621 | Rockford | 1983 |
| Stille, Larry | grain dryer control system | 4152840 | Rockford | 1979 |
| Tedesco, John | antigenic proteins and vaccines containing them for prevention of coccidiosis caused by eimeria eimeria necatrix and eimeria tenella | 5028694 | Charles City | 1991 |
| TePaske, Mark | leporin a, an antiinsectan fungal metabolite | 5281609 | Charles City | 1994 |
| Tjaden, Larry | three-point hitch guidance control | 5246077 | Charles City | 1993 |
| Tjaden, Leonard | three-point hitch guidance control | 5246077 | Charles City | 1993 |
| Tracey, Michael | Process for preparing hydromorphone and derivatives thereof | 10370382 | Charles City | 2019 |
| Tracey, Michael | Preparation of saturated ketone morphinan compounds by catalytic isomerisation | 9981978 | Charles City | 2018 |
| Tracey, Michael | Process for the formation of hydrocodone bitatrate | 9981979 | Charles City | 2018 |
| Tracey, Michael | Crystalline form of a substituted thiazolylacetic acid triethylamine salt | 9139542 | Charles City | 2015 |
| Trainer, Teddy | single direction toggle anchor | 5215418 | Charles City | 1993 |
| Trainer, Teddy | security head anchor | 5221167 | Charles City | 1993 |
| Trees, Alonzo | seeder attachment for vehicle bodies | 2619355 | Rockford | 1952 |
| Uetz, Al | bearing assembly with a splined inner race | 5584584 | Charles City | 1996 |
| Uetz, Al | bearing assembly with splined inner race and hay balers including same | 5448944 | Charles City | 1995 |
| Uttz, Lewis | brush | 185708 | Nora Springs | 1876 |
| VanEssen, Harold | 1-(4' -diazoniumphenyl)-pyridinium salts and the process of preparation | 3985724 | Charles City | 1976 |
| VanEssen, Harold | coccidiosis control with quinolinol derivatives | 3636216 | Charles City | 1972 |
| VanEssen, Harold | ortho-nitrobenzoic acid, 5-nitrofurfurylidene hydrazide | 3376296 | Charles City | 1968 |
| VanEssen, Harold | nitrofuran derivatives for treating coccidiosis | 3330724 | Charles City | 1967 |
| VanEssen, Harold | coccidiostatic remedies | 2879201 | Charles City | 1959 |
| VanEssen, Harold | methyl-phenyl-arsonic acid blackhead control compositions | 2815313 | Charles City | 1957 |
| VanEssen, Harold | organotin arsonate derivatives | 2762821 | Charles City | 1956 |
| VanHorn, Dean | equalizer for harrow evener | 3062562 | Charles City | 1962 |
| Vatne, Robert | alpha, alpha, alpha-trifluoro-6-substituted-5-nitro-5-toluic acid, 5'-nitrofurfurylidene hydrazide compounds as growth promotants | 3773943 | Charles City | 1973 |
| Vatne, Robert | alpha, alpha, alpha-trifluoro-6-substituted-5-nitro-5-toluic acid, 5'-nitrofurfurylidene hydrazide compounds | 3642784 | Charles City | 1972 |
| Vatne, Robert | composition for treating histomoniasis in poultry | 3621095 | Charles City | 1971 |
| Vatne, Robert | compositions and a method for the prevention and control of histomoniasis which employ a 5-nitroimidazole and a benzenearsonic acid | 3439097 | Charles City | 1969 |
| Vatne, Robert | 3,5-dinitrosalicylic acid, 5-nitrofurfuryli-dene hydrazide and compositions containing and methods employing the sme for the control of histomoniasis | 3424845 | Charles City | 1969 |
| Waggoner, Jacob | hair trimmer attachment for electric razors | 3008233 | Charles City | 1961 |
| Waggoner, Jacob | hair trimmer attachment | 2932891 | Charles City | 1960 |
| Walde, Arthur | dinotrobenzamide remedies for coccidiosis and salmonella infections | 3015606 | Charles City | 1962 |
| Walde, Arthur | coccidiostatic remedies | 2879201 | Charles City | 1959 |
| Walde, Arthur | methyl-phenyl-arsonic acid blackhead control compositions | 2815313 | Charles City | 1957 |
| Walde, Arthur | organotin arsonate derivatives | 2762821 | Charles City | 1956 |
| Walde, Arthur | veterinary tetravalent tin compositions | 2702775 | Charles City | 1955 |
| Walde, Arthur | veterinary tetravalent tin compositions | 2702776 | Charles City | 1955 |
| Walde, Arthur | veterinary tetravalent tin compositions | 2702777 | Charles City | 1955 |
| Walde, Arthur | veterinary tetravalent tin compositions | 2702778 | Charles City | 1955 |
| Walde, Arthur | N,N'-(3-nirto-benzene-sulfonyl) ethylene-diamine compositions for the treatment of coccidiosis | 2715600 | Charles City | 1955 |
| Walde, Arthur | composition for control of poultry coccidiosis | 2449080 | Charles City | 1948 |
| Walde, Arthur | composition for control of poultry coccidiosis | 2449081 | Charles City | 1948 |
| Wallace, David | traction wheel | 1265406 | Charles City | 1918 |
| Waller, Warren | hen's nest and nest rack | 1740323 | Charles City | 1929 |
| Waller, Warren | poultry perch | 1526029 | Charles City | 1925 |
| Waller, Warren | poultry rack | 1533484 | Charles City | 1925 |
| Waller, Warren | poultry perch | 1262880 | Charles City | 1918 |
| Waller, Warren | wire tightener | 913590 | Charles City | 1909 |
| Waller, Warren | hay stacker | 794825 | Charles City | 1905 |
| Waller, Warren | horse collar | 319044 | Charles City | 1885 |
| Walleser, Ernst | tractor filling device | 2227611 | Charles City | 1941 |
| Walling, John | reagents and methods for the detection and quantification of testosterone in fluid samples | 5851781 | Charles City | 1998 |
| Walling, John | reagents and methods for the detection and quantification of testosterone in fluid samples | 5559210 | Charles City | 1996 |
| Walling, John | process for the production of 1-.alpha.-(carboxyalkyl)-testosterone | 5581002 | Charles City | 1996 |
| Walling, John | reagents and methods for the detection and quantification of testosterone in fluid samples | 5491071 | Charles City | 1996 |
| Walsh, Clark | storage structure for farm crops | 2917138 | Charles City | 1959 |
| Walsh, Clark | prefabricated wire panel structures | 2842232 | Charles City | 1958 |
| Walsh, Clark | wagon box elevating and tilting device | 2549996 | Charles City | 1951 |
| Walsh, Clark | wagon box elevating and tilting device | 2524498 | Charles City | 1950 |
| Walsh, Clark | design for a combined fluid pressure tank and stand | 154966 | Charles City | 1949 |
| Webster, John | harvester | 147208 | Floyd | 1874 |
| Welch, Dean | alpha, alpha, alpha-trifluoro-6-substituted-5-nitro-5-toluic acid, 5'-nitrofurfurylidene hydrazide compounds as growth promotants | 3773943 | Charles City | 1973 |
| Welch, Dean | nitro-trifluoromethyl-benzanilides for treating coccidiosis | 3743745 | Charles City | 1973 |
| Welch, Dean | nitro-trifluoromethyl-benzanilides | 3689556 | Charles City | 1972 |
| Welch, Dean | alpha, alpha, alpha-trifluoro-6-substituted-5-nitro-5-toluic acid, 5-nitrofurfurylidene hydrazide compounds | 3642784 | Charles City | 1972 |
| Welch, Dean | nitro-trifluoromethyl thiobenzamides | 3555085 | Charles City | 1971 |
| Welch, Dean | process for producing nitroform | 3491160 | Charles City | 1970 |
| Wells, David | Planetary drive system | 8721490 | Marble Rock | 2014 |
| Wickstrom, Eric | Vehicle door power lock actuator | 10087662 | Charles City | 2018 |
| Wickstrom, Eric | Power locking door handles with integrated keypad | 9441403 | Charles City | 2016 |
| Wickstrom, Eric | Pull handle with integrated keypad | D708924 | Charles City | 2014 |
| Winn, Chester | stanchion | 496390 | Charles City | 1893 |
| Wolverton, George | plow | 371908 | Charles City | 1887 |
| Wyatt, Alvah | antiglare shield | 1790965 | Nora Springs | 1931 |
| Young, Otis | valve gearing | 751769 | Rockford | 1904 |
| Zbornik, Thomas | coccidiostatic remedies | 2879201 | Charles City | 1959 |
| Zbornik, Thomas | method of treating air sac infection in poultry with para-amino-benzoate composition | 2748051 | Charles City | 1956 |
| Zbornik, Thomas | organotin arsonate derivatives | 2762821 | Charles City | 1956 |
| Zbornik, Thomas | N,N'-(3-nitro-benzene-sulfonyl) ethylene-diamine compositions for the treatment of coccidiosis | 2715600 | Charles City | 1955 |
| Zbornik, Thomas | separation of isomeric mixtures of nitroanilines | 2671110 | Charles City | 1954 |
| Zeran, Lewis | dentist's implement | 769426 | Rockford | 1904 |
| Zierke, Vernon | hoist for loading heavy tractor tires | 2509950 | Charles City | 1950 |
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