| Fahrney | Ezra | hominy mill | 19060 | Deep River | 1858 |
| Wilder | S. | method of opening valves to extinguish fire | 25358 | Grinnell | 1859 |
| Beaton | William | churn | 44505 | Grinnell | 1864 |
| Beaton | William | device for measuring cloth in the piece or roll | 45131 | Grinnell | 1864 |
| Beaton | William | washing machine | 48894 | Grinnell | 1865 |
| Bliss | Marshall | mosquito canopy | 54674 | Grinnell | 1866 |
| Moore | James | tatting shuttle winder | 60407 | Grinnell | 1866 |
| Gould | Joseph | corn sheller | 72020 | Grinnell | 1867 |
| Herrick | Stephen | cultivator | 66340 | Grinnell | 1867 |
| Moody | W. | cultivator | 68525 | Montezuma | 1867 |
| Moody | W. | horse collar | 69712 | Montezuma | 1867 |
| Shipley | T. | horse collar | 69712 | Montezuma | 1867 |
| Moore | James | watch case calendar | 70104 | Grinnell | 1867 |
| Cassidy | John | sled brake | 74989 | Montezuma | 1868 |
| Gould | Joseph | beehive | 98761 | Grinnell | 1870 |
| Clement | John | windmill | 109496 | Grinnell | 1870 |
| Munger | Joseph | stalk cutter | 114308 | Malcom | 1871 |
| Lewis | Miles | stalk cutter | 114308 | Malcom | 1871 |
| Heckman | Henry | beehive | 111204 | Brooklyn | 1871 |
| Moore | James | sewing machine shuttle | 112480 | Grinnell | 1871 |
| Stanley | Ellis | needle threader | 132110 | Montezuma | 1872 |
| Miller | Richard | plow | 122956 | Sherman | 1872 |
| Harris | Thomas | earth auger | 132830 | Dresden | 1872 |
| Delescaille | Peter | velocipede | 133211 | Montezuma | 1872 |
| Busch | Carl | corn planter | 134032 | Brooklyn | 1872 |
| Moore | James | sewing machine ruffling attachment | 125608 | Grinnell | 1872 |
| Moore | James | sewing horse | 141791 | Grinnell | 1873 |
| Hirons | William | sewing machine | 141791 | Grinnell | 1873 |
| Cloud | Charles | agricultural boiler | 142326 | Grinnell | 1873 |
| Wheeler | James | car starter | 135187 | Grinnell | 1873 |
| Fahrney | Ezra | rein holder | 143409 | Deep River | 1873 |
| Moore | James | corn planter | 136337 | Grinnell | 1873 |
| Macy | Jason | corn planter | 136337 | Grinnell | 1873 |
| Pierson | David | corn planter | 136337 | Grinnell | 1873 |
| Legg | Charles | composition for molding plastic articles | 136658 | Malcom | 1873 |
| Johnson | James | heating stove | 137818 | Malcom | 1873 |
| Akers | William | heating stove | 137818 | Malcom | 1873 |
| Williams | Henry | wash boiler attachment | 138974 | Grinnell | 1873 |
| Cade | William | agricultural boiler | 149437 | Grinnell | 1874 |
| Wilson | Robert | churns | 153141 | Grinnell | 1874 |
| Hirons | William | sewing machine | 159575 | Grinnell | 1875 |
| Moore | James | sewing machine | 159575 | Grinnell | 1875 |
| Sutton | John | clothes drier | 167708 | Deep River | 1875 |
| Moore | James | harvester | 163275 | Grinnell | 1875 |
| Stickle | Charles | harvester | 163275 | Grinnell | 1875 |
| Benson | Washington | thill | 184578 | Grinnell | 1876 |
| Mathews | John | hay loader | 180900 | Grinnell | 1876 |
| Wheeler | John | beehive | 188452 | Warren Township, Poweshiek County | 1877 |
| Preston | Simon | stand for holding funnels, measures, & c. | 192348 | Grinnell | 1877 |
| Conaway | Henry | collar | 205528 | Deep River | 1878 |
| Fry | John | rotary churn | 208587 | Brooklyn | 1878 |
| Wishart | J. | harvester elevator | 212296 | Grinnell | 1879 |
| Craver | Charles | harvester elevator | 212296 | Grinnell | 1879 |
| Craver | Charles | driving wheel | 212663 | Grinnell | 1879 |
| Wishart | J. | driving wheel | 212663 | Grinnell | 1879 |
| Berg | John | fire extinguisher for cars | 229854 | Grinnell | 1880 |
| Berg | John | fire extinguisher for railway cars | 226220 | Grinnell | 1880 |
| Baird | Alva | threshold strip | 226823 | Malcom | 1880 |
| Wishart | James | harvester | 228154 | Grinnell | 1880 |
| Leffler | Paul | wire barbing machine | 232831 | Grinnell | 1880 |
| Clement | John | cattle pump | 229587 | Grinnell | 1880 |
| Berg | John | fire extinguisher for railway cars | 235847 | Grinnell | 1880 |
| Bayer | Charles | street crossing | 263754 | Grinnell | 1882 |
| Herrick | William | door check | 289259 | Grinnell | 1883 |
| Heald | Joel | check row marker | 282888 | Oak Grove | 1883 |
| Wheeler | James | shaft coupling | 283940 | Grinnell | 1883 |
| Herrick | William | apparatus for distilling water and other fluids | 284011 | Grinnell | 1883 |
| Macy | Volney | hay loader | 296591 | Searsborough | 1884 |
| Macy | Jason | hay loader | 296591 | Searsborough | 1884 |
| Terrell | Pleasant | wire barbing machine | 297472 | Grinnell | 1884 |
