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All Patents in class 83/249 | |||||
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Number | Title | Classification(s) | |||
682,686 | Punching-machine | 83/247, 83/249, 83/451, 83/633 | |||
2,064,731 | Automatic punch press | 100/216, 83/202, 83/249, 83/255, 83/701 |