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| All Patents in class 403/52 | |||||
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| Number | Date | Patentee | Title | Type | |
| 613,230 | Nov. 01, 1898 | F.W. Beckwith | Wrench | screw adjust wrenches | |
| 2,823,960 | Feb. 18, 1958 | W.J. Blazek, J.J. Strnad | Die sets for machine presses | dies for punch presses | |
| 2,846,278 | Aug. 05, 1958 | W.J. Blazek | Positioning means for guide assemblies of punch press die sets | dies for punch presses | |