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| Patents Granted on 1827-04-03 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,727X | Apr. 03, 1827 | J. Allen, Jr., C. Geoghegan | Manufacture of tobacco | tobacco machinery | |
| 4,728X | Apr. 03, 1827 | J.S. Davis | Making watch keys | watchmaking machinery | |