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| Patents Granted on 1830-03-30 | |||||
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| Number | Date | Patentee | Title | Type | |
| NX-5,894 | Mar. 30, 1830 | A. Stearns, Jr. | Staves | cooper | |
| 5,894X | Mar. 30, 1830 | W.W. Southworth | Cutting screws and gimlets | tool maker | |
| 5,895X | Mar. 30, 1830 | L.C. Tam | Harrow teeth fluke | harrows | |
| NX-183,003,301 | Mar. 30, 1830 | L.C. Tam | Harrow Teeth Fluke | harrows | |