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| Patents for Harry L. Coit | |||||
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| Number | Date | Patentee | Title | Type | |
| 813,864 | Feb. 27, 1906 | H.L. Coit | Ball-bearing drill chuck | drill press chucks | |
| 879,741 | Feb. 18, 1908 | H.L. Coit | Ball-bearing drill chuck | drill press chucks | |