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| Patents Granted on 1815-09-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,383X | Sep. 21, 1815 | J.S. Donlevy (Donlery) | Loxodromick pulley or measuring power to ascertain a ship's way, and for other purposes | ||
| 2,384X | Sep. 21, 1815 | W. Liddle | Biscuit making machine | cracker and biscuit machines | |