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| Patents for James Clark Jr. | |||||
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| Number | Title | Classification(s) | |||
| 472,063 | Automatic railway-switch | 246/356, 246/366 | |||
| 701,115 | Drilling machinery | 310/66, 408/132 | |||
| 750,744 | Portable drill | 173/217, 173/30, 310/50, 408/124 | |||