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| Patents Granted on 1801-03-__ | |||||
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| Number | Date | Patentee | Title | Type | |
| 320X | Mar. 02, 1801 | B. Henfrey | Mode of increasing evaporation for the purpose of distilling | distilling apparatus | |
| 321X | Mar. 16, 1801 | R. Weems | Boring machine for posts | drilling and boring | |
| 322X | Mar. 16, 1801 | W. Stillman | Cutting veneers | veneer machines | |
| 323X | Mar. 24, 1801 | J. Strong | Hydraulic Engine | hydraulic motors | |
| 324X | Mar. 24, 1801 | I. Hatch | Mode of making and discharging chain and cleaver shot | gunsmith | |