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| Patents Granted on 1822-03-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,481X | Mar. 21, 1822 | P. Quidor, Jr. | Wind, Water and Tide Mills | tide mills | |
| 3,482X | Mar. 21, 1822 | J. Ives | Making clock cases | ||
| GB-182,204,663 | Mar. 21, 1822 | G. Stephenson | Improvements in steam engines | steam engines | |
| GB-182,204,664 | Mar. 21, 1822 | W. Church | Improved apparatus for printing | type | |