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| Patents Granted on 1821-08-14 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,367X | Aug. 14, 1821 | D. Peck | Manufacture of boots and shoes | ||
| 3,368X | Aug. 14, 1821 | J. Sater | Curing blindness in horses | ||