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