| All Patents in class 81/91.2 |
Patents 1 -
15
of 32
      |
| Number | Date | Patentee | Title | Type |
| 126,506 | May 07, 1872 | W.C. Westerfield | Improvement in Pipe-Wrenches | pipe wrenches |
| 185,078 | Dec. 05, 1876 | D.B. Cook | Pipe-Wrench | pipe tongs |
| 200,175 | Feb. 12, 1878 | C.C. Coleman | Pipe-Wrench | self-adjust wrenches |
| 320,872 | Jun. 23, 1885 | J.F. Guthrie, Jr. | Pipe Wrench | pipe wrenches |
| 346,299 | Jul. 27, 1886 | F.C. Sawhill, T.D. McCarty | Improvements in Pipe-Tongs | pipe tongs |
| 359,197 | Mar. 08, 1887 | I. Anderson | Pipe Wrench | pipe wrenches |
| 416,792 | Dec. 10, 1889 | J.A. Maloney | Pipe Wrench | pipe wrenches |
| 441,020 | Nov. 18, 1890 | A.A. Peterkin | Pipe Wrench | chain and strap wrenches |
| 444,255 | Jan. 06, 1891 | G.F. Shaw | Pipe Wrench | self-adjust wrenches |
| 450,972 | Apr. 21, 1891 | T. Newman | Pipe Wrench | pipe wrenches |
| 491,850 | Feb. 14, 1893 | G.W. Morrill | Pipe Wrench | self-adjust wrenches |
| 498,638 | May 30, 1893 | G. Englund | Tool For Turning Pipes, Car Axles, Etc. | pipe tongs |
| 516,249 | Mar. 13, 1894 | C.H. Weaver | Pipe Wrench | pipe wrenches |
| 563,519 | Jul. 07, 1896 | R.J. Thompson | Combined Pipe and Nut Wrench | self-adjust wrenches |
| 590,562 | Sep. 28, 1897 | T.J. Baker | Pipe or Rod Wrench | pipe wrenches |
