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| Patents Granted on 1819-04-03 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,091X | Apr. 03, 1819 | P. Moody | Double speeder for roping cotton | rope maker | |
| 3,092X | Apr. 03, 1819 | J. Lyon | Propelling boats | nautical propulsion apparatus | |