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| Patents for Emil A. Hoefer | |||||
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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 | |
| 729,864 | Jun. 02, 1903 | A.G. Hoefer, F.W. Hoefer, E.A. Hoefer | Wire Gaging and Cutting Machine | wire gauging and cutting machines | |
| 766,883 | Aug. 09, 1904 | E.A. Hoefer, A.G. Hoefer, F.W. Hoefer | Drilling Machine | drill presses | |
| 809,372 | Jan. 09, 1906 | E.A. Hoefer | Variable-speed gear | drill presses | |