| All Patents in class 81/186 |
Patents 16 -
30
of 203
      |
| Number | Date | Patentee | Title | Type |
| 133,422 | Nov. 26, 1872 | F.L. Delfer | Wrenches | quick adjust wrenches |
| 133,902 | Dec. 10, 1872 | T. Stone | Pipe Wrench | pipe wrenches |
| 136,351 | Feb. 25, 1873 | T. Williams | Improvement in Self-Adjusting Pipe Wrenches | pipe wrenches |
| 150,301 | Apr. 28, 1874 | F.L. Delfer | Wrenches | axle nut wrenches |
| 165,271 | Jul. 06, 1875 | S. Stone | Improvement in Grappling-Tongs | pliers type wrenches |
| 175,272 | Mar. 28, 1876 | W.F. Cross | Improvement in wrenches and bit-stocks | brace chucks |
| 190,523 | May 08, 1877 | H.I. Cook, C. States | Improved Combined Pipe-Tongs, Wrench and Screw-Driver | wrench combination tools |
| 191,010 | May 22, 1877 | J.P. Mitchell | Improvement in Wrenches | screw adjust wrenches |
| 197,459 | Nov. 27, 1877 | C.A. Corman | Wrench | combination tools |
| 200,971 | Mar. 05, 1878 | A. Berdan, A.E. Warren | Wrench for Taking Off and Holding Burrs of Carriages, etc. | axle nut wrenches |
| 202,259 | Apr. 09, 1878 | C.W. Hilton | Wrench | wrenches |
| 212,468 | Feb. 18, 1879 | S.W. Hudson | Pipe-Wrench | pipe wrenches |
| 212,795 | Mar. 04, 1879 | D. Fisher | Pipe and Nut Wrench | wrench jaw components |
| 214,697 | Apr. 22, 1879 | P. Peppler | Pipe-Wrench Attachments | pipe jaw attachments for wrenches |
| 218,195 | Aug. 05, 1879 | H. Rhyn | Pipe-Wrench | pipe wrenches |
