| All Patents in class 81/182 |
Patents 46 -
58
of 58
      |
| Number | Date | Patentee | Title | Type |
| 638,759 | Dec. 12, 1899 | G.W. Prinzing | Combination Tool | pipe and nut combination wrenches |
| 639,162 | Dec. 12, 1899 | R. Fjellman | Pipe Wrench | pipe wrenches |
| 647,685 | Apr. 17, 1900 | J. Stewart | Combined Pipe Wrench and Cutter | pipe wrenches |
| 667,143 | Jan. 29, 1901 | E.E. Tryon | Combined Wrench and Cutter | wrench combination tools |
| 703,741 | Jul. 01, 1902 | G.E. Rothenbucher | Combination Wrench | pipe wrenches |
| 721,660 | Mar. 03, 1903 | C.S. Bonney | Pipe Wrench and Cutter | pipe and nut combination wrenches |
| 767,199 | Aug. 09, 1904 | J.G. Baker | Improved Combination Wrench With Pipe-Cutting Attachment | pipe and nut combination wrenches |
| 799,539 | Sep. 12, 1905 | H.A. Corwin | Combination Wrench | pipe and nut combination wrenches |
| 951,367 | Mar. 08, 1910 | W. DuCharme | Combination Tool | wrench combination tools |
| 1,224,801 | May 01, 1917 | E. Sprung | Stud Extractor and Tightener | stud extractors |
| 1,294,715 | Feb. 18, 1919 | E.H. Schultz | Combination Wrench | pipe and nut combination wrenches |
| 1,807,625 | Jun. 02, 1931 | H.J. Hjorth | Valve Wrench | wrenches |
| 5,005,449 | Apr. 09, 1991 | D.L. Gatzemeyer, J.A. Sorensen | Hand Tool or Improved Bar Clamp | clamps |
