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| Patents Granted on 1830-05-25 | |||||
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| Number | Date | Patentee | Title | Type | |
| NX-5,997 | May 25, 1830 | J. Rich, Jr. | Flax Mill | flax and hemp machines | |
| 5,997X | May 25, 1830 | J. Bogardus | Machine in form of flying traveller spinning cotton, flax, silk | spinner | |
| NX-5,998 | May 25, 1830 | C.S. Seabury | Piano | ||
| 5,998X | May 25, 1830 | I. Lewis | Manufacturing chain machine, called the mechanics' assistant | ||
| 5,999X | May 25, 1830 | S. Nisbet (Nisbet) | Plough | plows or ploughs | |