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| Patents for William L. Procunier | |||||
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| Number | Date | Patentee | Title | Type | |
| 900,122 | Oct. 06, 1908 | W.L. Procunier | Yielding Bit and Tap Chuck | drill press chucks | |
| 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 | |
| 1,037,796 | Sep. 03, 1912 | W.L. Procunier | Bit and tap and die chuck | tap and die holders | |
| 1,117,241 | Nov. 17, 1914 | W.L. Procunier | Bit and tap chuck | drill press chucks | |