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| Patents Granted on 1831-04-26 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,519X | Apr. 26, 1831 | A. Andrews | Saw mill dogs | sawmill dogs | |
| 6,520X | Apr. 26, 1831 | J.S. West | Thrashing machine | threshers and thrashers | |