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| Patents for William Hofer | |||||
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| Number | Date | Patentee | Title | Type | |
| 91,634 | Jun. 22, 1869 | W. Hofer | Improvement in screw-driver | spiral screwdrivers | |
| 533,689 | Feb. 05, 1895 | J. Weathers | Combined anvil, vise, and drill | combined anvil vises and drills | |