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| Patents Granted on 1824-07-29 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,917X | Jul. 29, 1824 | J. Dwight | Longitudinal bar for piano forte | music instrument maker | |
| 3,918X | Jul. 29, 1824 | A. Cooley | Rotary steam engine | rotary steam engines | |