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| Patents Granted on 1810-04-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,277X | Apr. 21, 1810 | J. Hawkins | Lamps and the liquid to be burned therein | ||
| 1,278X | Apr. 21, 1810 | M. Clark | Machine for cutitng fur from pelts and skins | ||