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| Patents for William Field | |||||
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| Number | Title | Classification(s) | |||
| 7,756X | Upright-spring sledge hammer | 72/404 | |||
| 9,137X | Double speeder | 57/67 | |||
| 1,553 | Manner of Manufacturing Screw-Augers | 72/412, 72/475 | |||