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| Patents Granted on 1830-12-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,295X | Dec. 20, 1830 | S. Bushnell, II | Churn | churns | |
| 6,296X | Dec. 20, 1830 | S. Bushnell, II | Washing machine | washing machines | |
| 6,297X | Dec. 20, 1830 | D. Flagg, Jr. | Revolving grates for grating apples and other vegetables | apple graters | |
| 6,298X | Dec. 20, 1830 | A.G. Hull | Truss (reissued) | ||
| 6,299X | Dec. 20, 1830 | L. Ebenezer | Washing machine | washing machines | |
| 6,300X | Dec. 20, 1830 | G. Twitchell | Elastic truss | ||