| All Patents in class 81/90.4 |
Patents 1 -
15
of 15
      |
| Number | Date | Patentee | Title | Type |
| 67,937 | Aug. 20, 1867 | W.C. Abbe | Improvement in Pipe-Wrenches | pipe wrenches |
| 171,999 | Jan. 11, 1876 | W. Crumbie | Improvement in Pipe-Wrench or Tongs | pipe tongs |
| 228,707 | Jun. 08, 1880 | W.C. Westerfield | Wrench Adapted To Grasping Cylindrical Bodies | chain and strap wrenches |
| 247,406 | Sep. 20, 1881 | N. Purdy | Pipe Tongs | chain and strap wrenches |
| 324,378 | Aug. 18, 1885 | J.T. Hayden | Pipe Wrench | chain and strap wrenches |
| 334,227 | Jan. 12, 1886 | W. Hellem | Improved Tubing and Pipe Tongs | pipe tongs |
| 542,012 | Jul. 02, 1895 | C.L. Dunham | Pipe Wrench | pipe wrenches |
| 573,637 | Dec. 22, 1896 | H.C. Barlow | Improvement in Pipe-Wrenches | pipe wrenches |
| 593,008 | Nov. 02, 1897 | J. Beermaker | Pipe Wrench | pipe wrenches |
| 605,441 | Jun. 07, 1898 | A.E. Brockett | Pipe Wrench | pipe wrenches |
| 638,814 | Dec. 12, 1899 | A.J. Sawin | Pipe Tongs | pipe tongs |
| 647,685 | Apr. 17, 1900 | J. Stewart | Combined Pipe Wrench and Cutter | pipe wrenches |
| 837,809 | Dec. 04, 1906 | J.J. Dixon | Pipe Wrench | pipe wrenches |
| 1,456,480 | May 22, 1923 | G.D. Becker | Pipe Wrench | pipe wrenches |
| 1,919,468 | Jul. 25, 1933 | O.V. Jones | Tong | pipe tongs |
