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| All Patents in class 81/156 | |||||
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| Number | Date | Patentee | Title | Type | |
| 999,034 | Jul. 25, 1911 | D.P. Kahle | Wrench | quick adjust wrenches | |
| 1,096,663 | May 12, 1914 | C.J. Archey | Wrench | quick adjust wrenches | |
| 1,407,360 | Feb. 21, 1922 | J.J. Thomas | Wrench | screw adjust wrenches | |