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| Patents Granted on 1826-04-01 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,378X | Apr. 01, 1826 | S. Morey | Gas or vapour engine | gas and gasoline engines | |
| 4,379X | Apr. 01, 1826 | A. Place | Dry docks | ||
| 4,380X | Apr. 01, 1826 | J. Brimhall, T. Keyes, Jr. | Heating callender rolers for glazing | ||