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Patents Granted on 1812-03-19 | |||||
Number | Date | Patentee | Title | Type | |
1,687X | Mar. 19, 1812 | J. Goulding | Thrashing machine | miller | |
1,688X | Mar. 19, 1812 | G.M. Broun (Brown) | Machine for separating grain and seeds by rubbing | miller |