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| Patents for Francis M. Boutwell | |||||
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| Number | Date | Patentee | Title | Type | |
| 227,402 | May 11, 1880 | J.F. Wood | Treatment of emery-wheels | grinding wheels | |
| 398,350 | Feb. 19, 1889 | G.T. Shepley | Drive Saw | compass saws | |