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| Patents Granted on 1819-06-05 | |||||
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| Number | Date | Patentee | Title | Type | |
| FX-3,112 | Jun. 05, 1819 | J.C. Langdon, B. Langdon | Propelling boats by horse power | nautical propulsion apparatus | |
| 3,112X | Jun. 05, 1819 | B. Langdon | Paddle wheel | nautical propulsion apparatus | |