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| Patents for H. J. Watson | |||||
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| Number | Date | Patentee | Title | Type | |
| RE8,150 | Apr. 02, 1878 | W. Lamb | Improvement in log-carriages for saw-mills | sawmill carriages | |
| 203,467 | May 07, 1878 | W. Lamb | Improvement in log-carriage gears for saw-mills | sawmill carriages | |