| All Patents in class 81/117 |
Patents 1 -
10
of 20
      |
| Picture | Number | Date | Patentee | Title |
 | 173,845 | Feb. 22, 1876 | E.G. Clinch | Pipe-Wrench |
 | 207,182 | Aug. 20, 1878 | B.S. Hyers | Improvements in Pipe and Nut Wrenches |
 | 366,246 | Jul. 12, 1887 | R.W. Philips | Self-Adjusting Pipe Wrench |
 | 382,391 | May 08, 1888 | G.G. Smith | Pipe Wrench |
 | 421,023 | Feb. 11, 1890 | J.W. McCoy, W.G. Bartlett | Pipe Wrench |
 | 503,677 | Aug. 22, 1893 | S.W. Putnam | Wrench |
 | 507,587 | Oct. 31, 1893 | T.C. Lippitt | Nut Wrench |
 | 556,834 | Mar. 24, 1896 | D.R. Porter | Pipe Wrench |
 | 615,643 | Dec. 06, 1898 | J.F. Strahle | Wrench |
 | 625,716 | May 23, 1899 | C. Baxter | Spanner |
