| All Patents in class 81/106 |
Patents 1 -
15
of 72
      |
| Number | Date | Patentee | Title | Type |
| 27,622 | Mar. 27, 1860 | J.H. Doolittle | Improved Pipe-Wrench | pipe wrenches |
| 33,223 | Sep. 03, 1861 | J.A. Wilcox | Instrument For Turning Pipe or Other Round Rods | pipe wrenches |
| 55,190 | May 29, 1866 | W.W. Wills | Improvemetnt in Pipe-Wrenches | screw adjust wrenches |
| 68,431 | Sep. 03, 1867 | J.N. Freestone | Improved Pipe-Wrench | pipe wrenches |
| 96,776 | Nov. 16, 1869 | J.W. Close | Improvement in Combined Screw and Pipe-Wrench and Pipe-Cutter | combination tools |
| 104,913 | Jun. 28, 1870 | J.A. Wilcox | Improvement In Pipe-Wrench | pipe wrenches |
| 111,422 | Jan. 31, 1871 | O.G. Barrett | Pipe Wrench | wrench jaw components |
| 121,372 | Nov. 28, 1871 | H.A. Hyle | Improvement in Wrenches | pipe wrenches |
| 155,485 | Sep. 29, 1874 | J. Bedman | Pipe-Wrenches | pipe wrenches |
| 168,852 | Oct. 19, 1875 | W.K. Stevens | Improvement in Pipe-Wrenches | pipe wrenches |
| 189,621 | Apr. 17, 1877 | E.R. Girvin | Pipe-Tongs Or Wrenches | pipe wrenches |
| 212,468 | Feb. 18, 1879 | S.W. Hudson | Pipe-Wrench | pipe wrenches |
| 217,407 | Jul. 08, 1879 | H. Rhyn | Pipe-Wrench | pipe wrenches |
| 221,989 | Nov. 25, 1879 | J. Woolford | Ratchet-Wrench | self-adjust wrenches |
| 227,892 | May 25, 1880 | L. Glynn | Improvements in Pipe and Nut Wrenches | screw adjust wrenches |
