| All Patents in class 81/164 |
Patents 1 -
10
of 35
      |
| Picture | Number | Date | Patentee | Title |
 | 2,991 | Mar. 04, 1843 | J. Williams, Jr. | Screw-Wrench |
 | 50,748 | Oct. 31, 1865 | J.C. Chapman, D.C. Stillson | Improved Tool for Turning Gas-Pipe, etc. |
 | 52,487 | Feb. 06, 1866 | J.C. Conner | Improvement in Wrenches |
 | 60,380 | Dec. 11, 1866 | J.V. Jepson | Improved Tool for Cutting Tubes |
 | 78,047 | May 19, 1868 | J.L. Brierly | Improvement in Pipe-Wrench and Cutter |
 | 94,241 | Aug. 31, 1869 | J.C. Chapman, A. Robes | Improvement in Pipe-Wrench and Pipe-Cutter |
 | 170,492 | Nov. 30, 1875 | H. Port | Improvement in Wrenches |
 | 191,010 | May 22, 1877 | J.P. Mitchell | Improvement in Wrenches |
 | 215,039 | May 06, 1879 | C.E. Billings | Tap Wrench |
 | 221,633 | Nov. 11, 1879 | J.H. Vinton | Pipe-Wrench |
