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| Patents for H. L. B. Lewis | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,222X | Nov. 01, 1830 | H.L. Lewis | Propelling canal boats by a lock paddle wheel | nautical propulsion apparatus | |
| 13,725 | Oct. 30, 1855 | H.L. Lewis | Veniilating Railroad-Cars | ||