| All Patents in class 81/97 |
Patents 1 -
15
of 95
      |
| Number | Date | Patentee | Title | Type |
| 6,002 | Jan. 02, 1849 | F.H. Bartholomew, S. Merrick | Screw Wrench For Grasping Cylindrical Forms | pipe wrenches |
| 12,510 | Mar. 13, 1855 | J. Hyde | Improvement in Screw-Wrenches | quick adjust wrenches |
| 14,424 | Mar. 11, 1856 | E. Tracy | Wrench | nut wrenches |
| 15,184 | Jun. 24, 1856 | G.A. Jenks | Wrench for Gas-Pipe, etc. | pipe wrenches |
| 24,175 | May 24, 1859 | H.J. Behrens | Improved Gripping Wrench | pipe wrenches |
| 26,951 | Jan. 24, 1860 | J.E. Neill | Improved Gripping Wrench | nut wrenches |
| 28,053 | May 01, 1860 | W.F. Beecher | Pipe-Wrench | pipe wrenches |
| 30,579 | Nov. 06, 1860 | W. Kearney | Improvements in Wrenches for Pipes and Stud-Bolts | pipe wrenches |
| 32,453 | May 28, 1861 | G.B. Phillips | Pipe Wrench | pipe wrenches |
| 35,950 | Jul. 22, 1862 | H.F. Read | Improved Pipe-Wrench for Screwing and Unscrewing Metal Pipes | pipe wrenches |
| 43,926 | Aug. 23, 1864 | W. Pearson | Pipe Wrench | pipe wrenches |
| 50,748 | Oct. 31, 1865 | J.C. Chapman, D.C. Stillson | Improved Tool for Turning Gas-Pipe, etc. | pipe wrenches |
| 59,852 | Nov. 20, 1866 | J. McLaren | Improvement in Wrenches | pipe and nut combination wrenches |
| 79,306 | Jun. 30, 1868 | C. Lyon, W. Bradshaw | Wrench | wrenches |
| 118,141 | Aug. 15, 1871 | A.P. Lord | Wrench | quick adjust wrenches |
