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| Patents for Howard N. Hinckley | |||||
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| Number | Date | Patentee | Title | Type | |
| 404,773 | Jun. 04, 1889 | W.H. Bunce, D. Slate, J. Rodda | Machine for packaging postal-cards | ||
| 667,880 | Feb. 12, 1901 | H.N. Hinckley, R. Anderson | Metal-working machine | drill presses | |
| 736,395 | Aug. 18, 1903 | H.N. Hinckley | Drill-Press Attachment | drill press accessories | |
| 772,568 | Oct. 18, 1904 | H.N. Hinckley | Drill-press | drill presses | |