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| Patents Granted on 1820-01-18 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,165X | Jan. 18, 1820 | C. Williams | Improvement in railways and carriages | ||
| 3,166X | Jan. 18, 1820 | Z. Chapin, S. Martin | Machine for washing, drying, and screening wheat | miller | |
| NX-182,001,181 | Jan. 18, 1820 | R. Guthrie | Corn Sheller | corn shellers | |