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| Patents Granted on 1830-05-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,982X | May 21, 1830 | J.M. Gates | Washing machine | washing machines | |
| 5,983X | May 21, 1830 | F.B. Howell | Paper cutting machine | paper cutting machines | |
| NX-5,984 | May 21, 1830 | C.B. Goodrich | Staves | cooper | |
| 5,984X | May 21, 1830 | A. Kirkpatrick | Washing machine | washing machines | |
| 5,985X | May 21, 1830 | C. Pawling | Plough | plows | |