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| All Patents in class 72/21.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,841,140 | Oct. 15, 1974 | J.F. Hryc | Control system for press brakes and the like | sheet metal brakes | |
| 5,253,498 | Oct. 19, 1993 | R.J. Benedict | Bending Brake with Multiple Selectively Operative Clamp Jaws | sheet metal brakes | |