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| Patents Granted on 1821-08-28 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,373X | Aug. 28, 1821 | J.J. Morris | Saddles | saddles | |
| 3,374X | Aug. 28, 1821 | R. Bulkley | Dry docks | ||
| 3,375X | Aug. 28, 1821 | E. Powers | Portable ice preserver | household tools | |