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| All Patents in class 81/157 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 12,410 | Feb. 20, 1855 | S.H. Noble | Screw-Wrench | |
 | 31,576 | Feb. 26, 1861 | W. Mason | Improved Screw-Wrench | |
 | 98,847 | Jan. 18, 1870 | G.J. Capewell | Wrench | |
 | 178,162 | May 30, 1876 | E.H. Knight | Wrench | |
 | 256,867 | Apr. 25, 1882 | J. Thomson | Improved Monkey Wrench | |
 | 291,213 | Jan. 01, 1884 | C.H. Miller | Monkey Wrench | |
 | 380,735 | Apr. 10, 1888 | W.L. Tobey | Wrench | |
 | 477,228 | Jun. 21, 1892 | E.W. Rider | Wrench | |
 | 549,601 | Nov. 12, 1895 | D. Gross, Jr. | Wrench | |
 | 570,856 | Nov. 03, 1896 | G.W. McElroy | Wrench | |