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Patents for William Black | |||||
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Number | Title | Classification(s) | |||
6,784X | Plough | 172/752 | |||
15,920 | Corn Sheller | 30/121.5 | |||
CA-17,602 | Buzz or trueing-up planers | ||||
783,502 | Clamp or vise | 269/165, 269/222, 269/238 |