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| Patents Granted on 1821-12-13 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,422X | Dec. 13, 1821 | N.N. Destrehan | Machine for raising water | ||
| 3,423X | Dec. 13, 1821 | S. Baker | Steam boilers | stationary boilers | |
| 3,424X | Dec. 13, 1821 | T. Rowell | Making treenails for ships | nail making machines | |