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| Patents for D. A. Hawkins | |||||
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| Number | Date | Patentee | Title | Type | |
| 20,379 | May 25, 1858 | G.C. Taft | Reverse double screw nut wrench | nut wrenches | |
| 23,725 | Apr. 19, 1859 | G.C. Taft | Improved Double Acting Screw-Wrench | nut wrenches | |