| All Patents in class 81/170 |
Patents 1 -
15
of 105
      |
| Number | Date | Patentee | Title | Type |
| 1,659 | Jun. 27, 1840 | H.W. Hewet | Screw Wrench | nut wrenches |
| 17,531 | Jun. 09, 1857 | E.J. Worcester | Improved Adjustable Fork-Jaw Wrench | screw adjust wrenches |
| 22,122 | Nov. 23, 1858 | J. Hyde | Screw-Wrench | nut wrenches |
| 29,623 | Aug. 14, 1860 | W. Russell | Wrench and Vise | nut wrenches |
| 31,826 | Mar. 26, 1861 | C.H. Reynolds | Improved Screw-Wrench | pipe wrenches |
| 38,316 | Apr. 28, 1863 | A.Y. McDonald | Improvement in Screw-Wrenches | nut wrenches |
| 41,995 | Mar. 22, 1864 | H.W. Hewet | Hewet Union Wrench | nut wrenches |
| 42,961 | May 31, 1864 | W.C. Noyes | Wrench | screw adjust wrenches |
| 47,067 | Mar. 28, 1865 | A.Y. McDonald | Improved Wrench | screw adjust wrenches |
| 49,128 | Aug. 01, 1865 | H.W. Love | Improved Screw-Wrench | wrench jaw components |
| 53,016 | Mar. 06, 1866 | H.W. Love | Improvement in Screw-Wrenches | wrench jaw components |
| 55,100 | May 29, 1866 | J. Hegarty | Nut Wrench | basin wrenches |
| 55,190 | May 29, 1866 | W.W. Wills | Improvemetnt in Pipe-Wrenches | screw adjust wrenches |
| 87,774 | Mar. 16, 1869 | H.W. Hewet | Mode of Constructing a Tubular Adjusting Screw-Wrench | nut wrenches |
| 103,653 | May 31, 1870 | T.C. Purington | Wrench | screw adjust wrenches |
