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| Patents Granted on 1819-12-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,150X | Dec. 21, 1819 | S. Simmons | Rockers for cradles, chairs, etc. | ||
| 3,151X | Dec. 21, 1819 | J. Corbett | Machine for boring holes in posts | wood drilling and boring | |
| 3,152X | Dec. 21, 1819 | L. Greene | Straw Cutting Machine | hay or straw cutters | |
| 3,153X | Dec. 21, 1819 | B. Croasdale | Improvement in making brushes from broom corn | brushes or brooms | |