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| Patents Granted on 1830-05-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| NX-5,956 | May 12, 1830 | J. Fairfield | Shingle Machine | shingle machines | |
| 5,956X | May 12, 1830 | A. Cross | Portable cooking furnace | stoves | |