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| Patents for John R. Williamson | |||||
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| Number | Date | Patentee | Title | Type | |
| 36,746 | Oct. 21, 1862 | S. Forsythe, J.R. Williamson | Improvement in sawing-machines | sawmill carriages | |
| 36,748 | Oct. 21, 1862 | J. Richards, J.R. Williamson | Improvement in saw-gears | sawmill carriages | |