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| All Patents in class 476/50 | |||||
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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 | |
| 512,099 | Jan. 02, 1894 | W.E. Dillard | Variable frictional feed for sawmills | circular sawmills | |
| 901,635 | Oct. 20, 1908 | S.J. Morgan | Gearing for drill-presses | drill presses | |