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| Patents Granted on 1811-08-30 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,570X | Aug. 30, 1811 | T. Hart | Double spring angular truss | ||
| 1,571X | Aug. 30, 1811 | N. Harlow, Jr., A. Henshaw | Pump for the use of ships | nautical pumps | |