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| Patents for A. H. Pierce | |||||
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| Number | Date | Patentee | Title | Type | |
| 34,498 | Feb. 25, 1862 | A.H. Pierce, F. Hollen | Nut Wrench | nut wrenches | |
| 122,139 | Dec. 26, 1871 | G.C. Taft | Improvement in Wrenches | wrench handle components | |