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Patents Granted on 1832-01-30 | |||||
Number | Date | Patentee | Title | Type | |
6,915X | Jan. 30, 1832 | J.C. Douglas | Piston safety valve | steam safety valves | |
6,916X | Jan. 30, 1832 | S. Drinkhouse | Washing hats | ||
6,917X | Jan. 30, 1832 | J.T. Quimby | Truss for vessels |