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| Patents for John C. Clarkson | |||||
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| Number | Date | Patentee | Title | Type | |
| 246,722 | Sep. 06, 1881 | T.L. Carley | Head-block for saw-mills | sawmill headblocks | |
| 254,458 | Mar. 07, 1882 | T.L. Carley | Saw-mill dog | sawmill dogs | |