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| Patents Granted on 1830-06-08 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,021X | Jun. 08, 1830 | T. Ewbank | Preventing explosion of steam boilers by detector | steam safety valves | |
| 6,022X | Jun. 08, 1830 | E.P. Parmelee | Iron tooth rake | rakes | |