| All Patents in class 81/68 |
Patents 46 -
60
of 66
      |
| Number | Date | Patentee | Title | Type |
| 722,144 | Mar. 03, 1903 | J.J. Rhinelander | Pipe Wrench | chain and strap wrenches |
| 733,648 | Jul. 14, 1903 | C.F. Hultgren | Chain Tongs | chain and strap wrenches |
| 770,165 | Sep. 13, 1904 | R.J. Cosseboom | Wrench | chain and strap wrenches |
| 826,939 | Jul. 24, 1906 | C.F. Hultgren | Chain Wrench | chain and strap wrenches |
| 850,696 | Apr. 16, 1907 | M.Z. Viau | Pipe Wrench | chain and strap wrenches |
| 865,369 | Sep. 10, 1907 | E.L. Fesler | Pipe Tongs | chain and strap wrenches |
| 1,063,153 | May 27, 1913 | L.D. Benedict | Pipe Wrench | chain and strap wrenches |
| 1,064,036 | Jun. 10, 1913 | A.J. Whitfield | Chain Wrench | chain and strap wrenches |
| 1,104,730 | Jul. 21, 1914 | W.J. Hamblin | Instantaneous Grip Chain Wrench | chain and strap wrenches |
| 1,174,764 | Mar. 07, 1916 | F.R. Riesenberg | Wrench | chain and strap wrenches |
| 1,245,062 | Oct. 30, 1917 | A. Stuewe | Wrench | chain and strap wrenches |
| 1,320,815 | Nov. 04, 1919 | C.A. Wright | Wrench | chain and strap wrenches |
| 1,410,993 | Mar. 28, 1922 | A.B. Carill | Chain Pipe Wrench | chain and strap wrenches |
| 1,919,593 | Jul. 25, 1933 | W. Boehm, L. Lassen | Chain Pipe Wrench | chain and strap wrenches |
| 2,605,662 | Aug. 05, 1952 | H.J. Elder | Adjustable Pipe Wrench | chain and strap wrenches |
