| All Patents in class 81/178 |
Patents 31 -
45
of 63
      |
| Number | Date | Patentee | Title | Type |
| 452,518 | May 19, 1891 | F.S. Cook | Wrench | pipe wrenches |
| 457,064 | Aug. 04, 1891 | E.M. Watson | Pipe Wrench | pipe tongs |
| 460,015 | Sep. 22, 1891 | G.W. Johnson | Pipe Tongs | pipe tongs |
| 489,455 | Jan. 10, 1893 | J.E. Kitson, G.W. Bufford | Pipe Wrench | pipe wrenches |
| 521,267 | Jun. 12, 1894 | W. King | Pipe Wrench | chain and strap wrenches |
| 542,012 | Jul. 02, 1895 | C.L. Dunham | Pipe Wrench | pipe wrenches |
| 547,039 | Oct. 01, 1895 | J.F. Smith | Wrench | pipe and nut combination wrenches |
| 575,592 | Jan. 19, 1897 | P.B. Canfield | Wrench | pipe and nut combination wrenches |
| 581,737 | May 04, 1897 | J.P. Kennedy | Pipe Wrench | pipe wrenches |
| 584,814 | Jun. 22, 1897 | J. Eaton | Wrench | pipe wrenches |
| 603,305 | May 03, 1898 | M. Weiss | Wrench | wrench combination tools |
| 614,156 | Nov. 15, 1898 | J.F. Woodford | Wrench | pipe and nut combination wrenches |
| 616,019 | Dec. 13, 1898 | C.M. Ryder | Wrench | wrench jaw components |
| 616,414 | Dec. 20, 1898 | M.C. Gay | Wrench | wrench jaw components |
| 690,688 | Jan. 07, 1902 | C.J. Barnes | Combination Wrench | nut wrenches |
