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| All Patents in class 100/346 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,935,811 | Feb. 03, 1976 | J.O. Lenz, I.E. Wolfe | Bolster table device for punch press | punch presses | |
| 4,289,066 | Sep. 15, 1981 | N.J. Proga | Hydraulic position control for mechanical power press slides | stamping presses | |