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| Patents Granted on 1830-03-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,872X | Mar. 12, 1830 | E. Beard | Slide for a Bee Hive | apiary apparatus | |
| NX-5,873 | Mar. 12, 1830 | D. Parmerlie | Bark Mill | bark processing machines | |
| 5,873X | Mar. 12, 1830 | L. Blake | Making and using types | printer | |
| 5,874X | Mar. 12, 1830 | W. Carlock | Machine for washing and cleaning hats | trade specific | |
| 5,875X | Mar. 12, 1830 | J. Hampton | Preserving meats and fruits | food preservation apparatus | |