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| Patents Granted on 1857-12-15 | |||||
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| Number | Date | Patentee | Title | Type | |
| XC-808 | Dec. 15, 1857 | A. Cant | New root cutting machine | agricultural | |
| 18,860 | Dec. 15, 1857 | T.T. Prosser | Portable sawmill | circular sawmills | |
| 18,872 | Dec. 15, 1857 | L. Stevens | Boring Machine | wood drilling and boring | |
| 18,877 | Dec. 15, 1857 | R.N. Watrous | Drawing Knife | draw knives | |
| 18,879 | Dec. 15, 1857 | W. Wells | Improvement in machines for pegging boots and shoes | shoemaking | |