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| Patents Granted on 1821-08-10 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,359X | Aug. 10, 1821 | J. Ketcham, G.F. Reeve | Inclined wheel for churning by dog power | churns | |
| 3,360X | Aug. 10, 1821 | F. Woodward | Smut and scouring machine | miller | |
| 3,361X | Aug. 10, 1821 | J. Thorp (Thorpe) | Braiding Machine | textile machines | |
| 3,362X | Aug. 10, 1821 | J. Richards | Manufacturing sail cloth | looms | |