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| Patents for H. H. Antrim | |||||
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| Number | Date | Patentee | Title | Type | |
| 506,865 | Oct. 17, 1893 | D.C. Stover, F.W. Hoefer, E.A. Hoefer, A. Hoefer | Sensitive drill | drill presses | |
| 625,838 | May 30, 1899 | L.M. Devore | Lemon-squeezer | ||