| All Patents in class 81/90.1 |
Patents 1 -
15
of 20
      |
| Number | Date | Patentee | Title | Type |
| 18,266 | Sep. 22, 1857 | H.D. Blake | Improvement in Hand-Wrenches | self-adjust wrenches |
| 95,438 | Oct. 05, 1869 | A.B. Davis | Wrench | pipe wrenches |
| 177,100 | May 09, 1876 | G.M. Curry | Pipe Tongs | pipe tongs |
| 202,089 | Apr. 09, 1878 | H. Badcock | Pipe Tongs | pipe tongs |
| 218,639 | Aug. 19, 1879 | W. Newcomb | Pipe-Wrenches | pipe wrenches |
| 286,847 | Oct. 16, 1883 | H. Rhyn | Pipe Tongs | pipe wrenches |
| 461,032 | Oct. 13, 1891 | C. Miller | Improved Wrench for Screwing and Unscrewing Pipes or Anything Round | self-adjust wrenches |
| 497,260 | May 09, 1893 | G.P. Woelfel | Pipe Wrench | self-adjust wrenches |
| 514,781 | Feb. 13, 1894 | F.S. Seymour | Wrench | axle nut wrenches |
| RE11,459 | Dec. 18, 1894 | G.P. Woelfel | Pipe Wrench | pipe wrenches |
| 592,036 | Oct. 19, 1897 | C.O. Woods | Pipe Wrench | pipe wrenches |
| 654,283 | Jul. 24, 1900 | A.J. Sawin | Pipe Wrench | pipe wrenches |
| 807,397 | Dec. 12, 1905 | H.L. Newton | Pipe Wrench | quick adjust wrenches |
| 924,816 | Jun. 15, 1909 | E.M. Newell | Wrench and Cutter | pipe wrenches |
| 996,841 | Jul. 04, 1911 | J.J. Dixon | Wrench | pipe wrenches |
