| All Patents in class 81/90.4 |
Patents 1 -
10
of 15
      |
| Picture | Number | Date | Patentee | Title |
 | 67,937 | Aug. 20, 1867 | W.C. Abbe | Improvement in Pipe-Wrenches |
 | 171,999 | Jan. 11, 1876 | W. Crumbie | Improvement in Pipe-Wrench or Tongs |
 | 228,707 | Jun. 08, 1880 | W.C. Westerfield | Wrench Adapted To Grasping Cylindrical Bodies |
 | 247,406 | Sep. 20, 1881 | N. Purdy | Pipe Tongs |
 | 324,378 | Aug. 18, 1885 | J.T. Hayden | Pipe Wrench |
 | 334,227 | Jan. 12, 1886 | W. Hellem | Improved Tubing and Pipe Tongs |
 | 542,012 | Jul. 02, 1895 | C.L. Dunham | Pipe Wrench |
 | 573,637 | Dec. 22, 1896 | H.C. Barlow | Improvement in Pipe-Wrenches |
 | 593,008 | Nov. 02, 1897 | J. Beermaker | Pipe Wrench |
 | 605,441 | Jun. 07, 1898 | A.E. Brockett | Pipe Wrench |
