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| Patents Granted on 1821-02-01 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,287X | Feb. 01, 1821 | J. Wood | Shifting share for ploughing | plows | |
| 3,288X | Feb. 01, 1821 | R. Graves (Greaves) | Machine for laying cordage | rope maker | |
| 3,289X | Feb. 01, 1821 | G.J. Newberry | Mode of applying dry metallic and colored powders to type printing | ||