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| Patents Granted on 1821-08-07 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,355X | Aug. 07, 1821 | R. Bulkley | Oblique water wheel | water wheels | |
| 3,363X | Aug. 07, 1821 | G. Smith | Anti-Dyspeptic Pills | medical pills and syrups | |