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| Patents Granted on 1812-02-17 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,665X | Feb. 17, 1812 | A.H. Quincy | Furnace for Heating Ovens | furnaces | |
| 1,666X | Feb. 17, 1812 | R. Crosbie | Granulating gun powder | gunsmith | |
| 1,667X | Feb. 17, 1812 | R. Crosbie | Rolling draw bridges | drawbridges | |