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| Patents Granted on 1830-06-11 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,028X | Jun. 11, 1830 | J.B. Chapman, J. Longhead | Explosion guard for steamboats | boats and ships | |
| 6,029X | Jun. 11, 1830 | H.B. Williams | Gasometer | gas meters | |