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| Patents for David Pierce | |||||
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| Number | Title | Classification(s) | |||
| 5,428X | Machine for sawing down trees | ||||
| 681 | Crosscut eclipse shearing-machine for shearing woolen cloths | 26/15R, 48/124, 48/94 | |||
| 13,099 | Machine for manufacturing woodenware | 147/1, 147/13, 147/40 | |||
| 870,759 | Relieving Mechanism for Engine Lathes | 451/374, 451/392, 82/17, 82/19 | |||