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| Patents Granted on 1810-02-21 | |||||
| Number | Date | Patentee | Title | Type | |
| 1,218X | Feb. 21, 1810 | N. Shaler | System of signals for vessels | ||
| 1,219X | Feb. 21, 1810 | M.L. Morse | Pendulum scale | scales and balances | |
| 1,220X | Feb. 21, 1810 | E. Raymond | Cheese press | cheese press | |