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| Patents for O. C. Briggs | |||||
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| Number | Date | Patentee | Title | Type | |
| 98,111 | Dec. 21, 1869 | G. Selden | Improvement in indicator for saw-mill head-blocks | sawmill headblocks | |
| 99,486 | Feb. 01, 1870 | O.C. Briggs, G. Selden | Improvement in head-blocks for sawmills | sawmill headblocks | |