| All Patents in class 81/181 |
Patents 16 -
30
of 53
      |
| Number | Date | Patentee | Title | Type |
| 149,944 | Apr. 21, 1874 | W.W. Micks | Pipe-Wrenches and Cutters | pipe wrenches |
| 174,778 | Mar. 14, 1876 | G.H. Buzzell | Pipe-Tongs | pipe tongs |
| 174,927 | Mar. 21, 1876 | J.S. Stewart | Pipe Tongs and Cutter | wrench jaw components |
| 179,546 | Jul. 04, 1876 | H.W. Evans | Improvements in Pipe Cutters and Wrenches | wrench combination tools |
| 183,485 | Oct. 24, 1876 | J. Brewer | Combined Wrench and Pipe-Cutter | pipe wrenches |
| 194,488 | Aug. 21, 1877 | B.L. Walker | Pipe And Nut Wrenches With Cutters | pipe jaw attachments for wrenches |
| 197,658 | Nov. 27, 1877 | A. Ochsner | Pipe-Tongs and Cutter | combination tools |
| 207,102 | Aug. 20, 1878 | J. Brewer | Pipe-Wrench With Cutter | combination tools |
| 208,440 | Sep. 24, 1878 | W.L. Truland | Pipe-Wrench With Cutter | combination tools |
| 208,582 | Oct. 01, 1878 | C. Fenton | Cutter for Pipe Cutter or Wrench | pipe cutters |
| 212,369 | Feb. 18, 1879 | J. Gilberds, B. Franklin | Pipe-Wrench With Cutter | pipe wrenches |
| 287,378 | Oct. 23, 1883 | H. Herbert | Pipe Tongs and Cutter | pipe tongs |
| 290,106 | Dec. 11, 1883 | H. Port | Convertible Tool | combination tools |
| 290,810 | Dec. 25, 1883 | J.L. Strait | Pipe Tongs | pipe tongs |
| 328,270 | Oct. 13, 1885 | J. Williamson | Pipe Wrench and Cutter | pipe wrenches |
