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| Patents Granted on 1817-01-17 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,721X | Jan. 17, 1817 | I. Jennings | Cotton gin | cotton gins | |
| 2,722X | Jan. 17, 1817 | I. Jennings | Rotary steam engines | rotary steam engines | |