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| Patents Granted on 1833-02-19 | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,431X | Feb. 19, 1833 | J.C. Douglas | Evaporating vessels to carry caloric from No.1 to any number upwards, purifying sugar, extracting acids therefrom | evaporating apparatus | |
| 7,432X | Feb. 19, 1833 | J.B. Maag | Balance platform | ||