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| Patents Granted on 1821-12-05 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,414X | Dec. 05, 1821 | E. Spencer | Machine for hulling and shelling rice | miller | |
| GB-182,104,622 | Dec. 05, 1821 | C. Broderip | Steam engines | steam engines | |