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| Patents for Joseph P. Mitchell | |||||
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| Number | Date | Patentee | Title | Type | |
| 191,010 | May 22, 1877 | J.P. Mitchell | Improvement in Wrenches | screw adjust wrenches | |
| 385,366 | Jul. 03, 1888 | J.P. Mitchell | Wrench | screw adjust wrenches | |