| All Patents in class 81/99 |
Patents 1 -
15
of 110
      |
| Number | Date | Patentee | Title | Type |
| 18,135 | Sep. 08, 1857 | H.M. Clark | Hinged Claw and Screw-Adjusting Gripper Wrench | pipe wrenches |
| 30,997 | Dec. 18, 1860 | A.E. Wenzel | Automatic Lathe Dog | lathe dogs |
| 34,498 | Feb. 25, 1862 | A.H. Pierce, F. Hollen | Nut Wrench | nut wrenches |
| 36,289 | Aug. 26, 1862 | H.V. Faries | Improved Wrench for Grasping and Turning Gas-Pipes, Bolts and Any Article of Cylindrical Form | pipe wrenches |
| 37,395 | Jan. 13, 1863 | H. Getty | Improved Self-Adjusting Pipe Tongs | self-adjust wrenches |
| 44,703 | Oct. 18, 1864 | J.R. Brown | Improved Pipe-Wrench | pipe wrenches |
| 65,465 | Jun. 04, 1867 | J.B. Barnes | Improvement in Pipe and Stud-Wrenches | self-adjust wrenches |
| 78,176 | May 26, 1868 | J.B. Barnes | Improvement in Wrenches | pipe wrenches |
| 118,891 | Sep. 12, 1871 | J.A. Wilcox, W.S. Wilcox | Improvement in Pipe Wrench | pipe wrenches |
| 121,372 | Nov. 28, 1871 | H.A. Hyle | Improvement in Wrenches | pipe wrenches |
| 131,252 | Sep. 10, 1872 | J. Craig | Improvement in Self-Adjusting Pipe Wrenches | pipe wrenches |
| 136,351 | Feb. 25, 1873 | T. Williams | Improvement in Self-Adjusting Pipe Wrenches | pipe wrenches |
| 145,263 | Dec. 02, 1873 | H.B. Wheatcroft | Pipe-Wrenches | pipe wrenches |
| 165,725 | Jul. 20, 1875 | L. Glynn | Improvement in Pipe-Tongs | pipe tongs |
| 172,365 | Jan. 18, 1876 | A.F. Gates, E.H. Adams | Pipe-Wrench | self-adjust wrenches |
