| Music: "Come Josephine, In My Flying Machine," 1910, performed by Ada Jones & Billy Murray from Internet Archive. |
 Hemp Brake
by John T. Gilman
1864
 Sugar Evaporator
by James High
1863
 Tire Bender
by Joseph Tomlinson
1873
 Design for a Pin
by Roy Kleineck
1943
 Denture Cleaner
by Brian James
1993
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PAT. #
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NAME
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TOWN
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TITLE
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DATE
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| 3693593 | Ackermann, Harry John | Monticello | automatic poultry feeding device | 26 Sep 1972 |
| 209639 | Ainsworth, Clark | Monticello | harvester | 5 Nov 1878 |
| 212879 | Ainsworth, Clark | Monticello | elevator for harvesters | 4 Mar 1879 |
| 3931877 | Albaugh, LeMar L. | Anamosa | material diverter structure | 13 Jan 1976 |
| 46202 | Aldrich, David C. | Anamosa | churn | 7 Feb 1865 |
| 1018227 | Althen, Frederick C. | Anamosa | bias band maker | 20 Feb 1912 |
| 1561453 | Althen, Frederick C. | Anamosa | milk bottle carrier | 17 Nov 1925 |
| 656495 | Anderson, James P. | Anamosa | carburetor | 21 Aug 1900 |
| 2516744 | Arends, Arnold J. | Monticello | cow tail holder | 25 Jul 1950 |
| 30390 | Baldwin, William | Anamosa | tanning | 16 Oct 1860 |
| 4883022 | Barker, B. A, | Monticello | animal waterer | 28 Nov 1989 |
| 3835882 | Barker, Bernard A. | Monticello | float valve assembly | 17 Sep 1974 |
| 4901753 | Barker, Bernard A. | Monticello | float assembly valve | 20 Feb 1990 |
| 183107 | Beam, Charles | Jackson Twp | milk safe | 10 Oct 1876 |
| 1103169 | Beam, Frank B. | Anamosa | combined dish drainer, steamer, roaster, or baking pan | 14 Jul 1914 |
| 1510972 | Beam, Stephen E. | Anamosa | casket stand | 7 Oct 1924 |
| 25671 | Beardsley, Frederick F. | Castle Grove | tanning composition | 4 Oct 1859 |
| 348715 | Bedford, George J. | Anamosa | freight car lock | 7 Sep 1886 |
| 384736 | Bedford, George J. | Anamosa | mail pouch | 19 Jun 1888 |
| 459484 | Bedford, George J. | Anamosa | lock | 15 Sep 1891 |
| 759961 | Beems, Clark A. | Anamosa | knockdown box | 17 May 1904 |
| 1033980 | Belknap, John A. | Anamosa | spade step | 30 Jul 1912 |
| 751451 | Belknap, Thomas M. | Anamosa | rail joint | 9 Feb 1904 |
| 934132 | Benedict, James Z. | Monticello | push cart | 14 Sep 1909 |
| 3059444 | Bickel, Fay D. | Anamosa | freezing apparatus | 16 Oct 1962 |
| 493814 | Bingham, William F. | Monticello | watch bow fastener | 21 Mar 1893 |
| 493815 | Bingham, William F. | Monticello | watch key | 21 Mar 1893 |
| 363981 | Bissell, Daniel J. | Anamosa | cultivator attachment | 31 May 1887 |
| 508401 | Blood, Charles N. | Anamosa | stump extractor | 14 Nov 1893 |
| 523100 | Blood, Charles N. | Anamosa | stump extractor | 17 Jul 1894 |
| 525481 | Blood, Charles N. | Anamosa | rope grip | 4 Sep 1894 |
| 533431 | Blood, Charles N. | Anamosa | stump extractor | 5 Feb 1895 |
| 2261048 | Bobst, Charles P. | Anamosa | cover or lid fastener | 28 Oct 1941 |
| 4175418 | Bollwitt, Duaine L. | Monticello | temperature monitoring and temperature differential control device | 27 Nov 1979 |
| 51947 | Bowen, Asa C. | Bowen’s Prairie | hay loader | 9 Jan 1866 |
| 77248 | Bradstreet, S. Y. | Monticello | safety truck | 28 Apr 1868 |
| RE3024 | Bradstreet, S. Y. | Monticello | improved safety truck | 7 Jul 1868 |
| 5521608 | Brandt, Robert L. | Anamosa | multibay coplanar direction finding antenna | 28 May 1996 |
| 810708 | Brister, Samuel H. | Monticello | brush | 23 Jan 1906 |
| 4441824 | Brokaw, Kim C. | Monticello | portable waste agitator | 10 Apr 1984 |
| 164554 | Bronson, James W. | Wyoming | bridle bit | 15 Jun 1875 |
| 703232 | Brown, Frank E. | Anamosa | ice skate | 24 Jun 1902 |
| 340281 | Brownell, Benjamin C. | Center Junction | self clearing breaking plow colter | 20 Apr 1886 |
| 1370781 | Burns, James L. | Anamosa | toilet tank and valve | 8 Mar 1921 |
| 141916 | Burns, Joseph | Anamosa | earth boring machine | 19 Aug 1873 |
| 732274 | Byrne, Michael F. | Monticello | screen and storm door | 30 Jun 1903 |
| 5886665 | Carlson, Stephen G. | Anamosa | gnss local constellation/ acquisition aiding system | 23 Mar 1999 |
| 5309598 | Carpenter, Joyce A. | Oxford Junction | paint scraper kit | 10 May 1994 |
| 5461736 | Carpenter, Joyce A. | Oxford Junction | portable hydraulic lift step stool for raising handicapped patients to an elevated location | 31 Oct 1995 |
| 814830 | Carroll, Louis W. | Anamosa | telephone system | 13 Mar 1906 |
| 958224 | Carroll, Louis W. | Anamosa | electric signaling apparatus | 17 May 1910 |
| 996701 | Carroll, Louis W. | Anamosa | automatic cut out for aerial telephone lines and the like | 4 Jul 1911 |
| 1036796 | Carroll, Louis W. | Anamosa | selective signal | 27 Aug 1912 |
| 651297 | Cashen, John | Monticello | vehicle brake | 5 Jun 1900 |
| 149639 | Chandler, John A. | Monticello | reamer for earth borers | 14 Apr 1874 |
| 193395 | Chandler, John A. | Monticello | wood sawing machine | 24 Jul 1877 |
| 191001 | Chase, Job | Langworthy | hay stacker | 22 May 1877 |
| 171549 | Chatfield, Alonzo B. | Anamosa | door spring | 28 Dec 1875 |
| 574136 | Clark, Leroy | Monticello | corn husker | 29 Dec 1896 |
| 550946 | Clymer, Albert | Olin | sawbuck | 10 Dec 1895 |
| 674758 | Cole, Rebecca J. | Olin | kitchen cabinet | 21 May 1901 |
| 203421 | Cole, Sherman M. | Anamosa | pump | 17 May 1878 |
| 296531 | Cole, Sherman M. | Anamosa | measuring pump | 8 Apr 1884 |
| 324301 | Cole, Sherman M. | Anamosa | measuring pump | 11 Aug 1885 |
| 400637 | Cole, Sherman M. | Anamosa | washing machine | 2 Apr 1889 |
| 771715 | Cole, Sherman M. | Anamosa | fire escape | 4 Oct 1904 |
| 777003 | Cole, Sherman M. | Anamosa | rotating door | 6 Dec 1904 |
| 936761 | Cole, Sherman M. | Anamosa | cuff shaper | 12 Oct 1909 |
| 6125685 | Collier, Rebecca E. | Madison | apparatus and method for the evaluation of asphalt mixes | 3 Oct 2000 |
| 918970 | Conmey, Fred W. | Wyoming | fuel economizer | 20 Apr 1909 |
| 574136 | Conner, Patrick H. | Monticello | corn husker | 29 Dec 1896 |
| 581065 | Conner, Patrick H. | Monticello | hitching post | 20 Apr 1897 |
| 590610 | Conner, Patrick H. | Monticello | hay loader coupling | 28 Sep 1897 |
| 611354 | Conner, Patrick H. | Monticello | vending machine | 27 Sep 1898 |
| 200897 | Conser, Eli P. | Monticello | revolving box churn and device for operating the same | 5 Mar 1878 |
| 30390 | Crane, Boswell | Anamosa | tanning | 16 Oct 1860 |
| 471233 | Crane, Sylvannus B. | Oxford Junction | automatic car indicator operating device | 22 Mar 1892 |
| 430117 | Crane, Sylvanus B. | Oxford Junction | station indicator | 17 Jun 1890 |
| 1523176 | Cubbage, Dacil | Oxford Junction | foot accelerator for motor vehicles | 13 Jan 1925 |
| 2614433 | Cuckler, David E. | Monticello | portable power unit | 21 Oct 1952 |
| 232388 | Cudworth, John G. | Anamosa | milk cooler | 21 Sep 1880 |
| 304522 | Cummings, Charles A. | Monticello | trace-carrier | 2 Sep 1884 |
| 317443 | Cunningham, Phebe J. | Amber | flower stand | 5 May 1885 |
| 241939 | Curtis, Nimrod J. | Martelle | check rower for corn planters | 24 May 1881 |
| 241939 | Curtis, William J.T. | Martelle | check rower for corn planters | 24 May 1881 |
| 1327088 | Curttright, George L. | Olin | hog oiler | 6 Jan 1920 |
| 440421 | Curttwright, John E. | Onslow | combine rack and dish warmer | 11 Nov 1890 |
| 3465832 | De Larm, Gerald L. | Wyoming | farm implement lift assembly and drawbar combination | 9 Sep 1969 |
| 6325399 | DeMoss, David | Anamosa | side lift wheel chairs | 4 Dec 2001 |
| 6412424 | Dirks, Dave | Monticello | tailgate display table | 2 Jul 2002 |
| 3028905 | Dirks, Henry D. | Anamosa | shaft straightening machine | 10 Apr 1962 |
| 1228540 | Druecker, Joseph M. | Stone City | automatic dumping and righting mechanism for tiltable dump cars | 5 Jun 1917 |
| 1575554 | Dufloth, Philip L. | Anamosa | knife sharpener | 2 Mar 1926 |
| 720120 | Elges, Gottlieb D. | Monticello | window screen | 10 Feb 1903 |
| 401259 | Ellis, Lucien W. | Anamosa | sheaf carrier for harvesters | 9 Apr 1889 |
| 401259 | Ellis, Lucien W. | Anamosa | sheaf carrier for harvesters | 9 Apr 1889 |
| 480944 | Ellis, Lucien W. | Anamosa | bundle carrier for harvesters | 16 Aug 1892 |
| 549114 | Ellis, Lucien W. | Anamosa | sheaf carrier | 5 Nov 1895 |
| 4910443 | Etscheidt, Ronald J. | Anamosa | electronic control circuit for a bidirectional motor | 20 Mar 1990 |
| 4912380 | Etscheidt, Ronald J. | Anamosa | field installable electrical operator for a circuit breaker | 27 Mar 1990 |
| 4921083 | Etscheidt, Ronald J. | Anamosa | clutch module with predetermined torque | 1 May 1990 |
| 5166862 | Etscheidt, Ronald J. | Anamosa | panel for mounting electronics | 24 Nov 1992 |
| 5486666 | Etsheidt, Ronald J. | Anamosa | protective cover for electrical terminals and method of using same | 23 Jan 1996 |
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