| All Patents in class 81/DIG4 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 19,954 | Apr. 13, 1858 | E.S. Scripture | Improvement in Screw-Wrenches | nut wrenches |
| 138,932 | May 13, 1873 | H.F. Read | Improvement in Wrenches | quick adjust wrenches |
| 170,089 | Nov. 16, 1875 | B.F. Joslyn | Wrench | screw adjust wrenches |
| 170,860 | Dec. 07, 1875 | B.F. Joslyn | Wrench | quick adjust wrenches |
| 172,551 | Jan. 25, 1876 | J.R. Brown | Improvement in Coach-Wrenches | pipe and nut combination wrenches |
| 190,636 | May 08, 1877 | L.S. Starrett | Wrench | screw adjust wrenches |
| 241,881 | May 24, 1881 | H.F. Read | Wrench | nut wrenches |
