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| Patents for Woodstock Safety Chuck Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-124,683 | Mar. 29, 1910 | W.L. Procunier | Yielding bit and tap chuck | drill press chucks | |
| 1,002,310 | Sep. 05, 1911 | W.L. Procunier | Safety-chuck | drill press chucks | |