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| Patents Granted on 1817-01-22 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,725X | Jan. 22, 1817 | S. Davis | Floating machine for removing mud | ||
| 2,726X | Jan. 22, 1817 | H. Nold | Machine for raising weights | ||
| 2,727X | Jan. 22, 1817 | H. Ricketson | Boiler | stationary boilers | |
| 2,728X | Jan. 22, 1817 | W. Hart | Mode of applying draught horses to machinery | ||