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| Patents for Procunier Safety Chuck Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,781,192 | Nov. 11, 1930 | H.G. Procunier | Tapping attachment | tapping heads and chucks | |
| 1,857,012 | May 03, 1932 | M.H. Corley | Tap holder | tapping heads and chucks | |
| 1,873,476 | Aug. 23, 1932 | H.G. Procunier | Tap holder | tapping heads and chucks | |
| 2,098,675 | Nov. 09, 1937 | H.G. Procunier | Tool-holding chuck and collet therefor | tap and die holders | |