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| All Patents in class 91/218 | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,972 | Mar. 11, 1851 | J.W. Fowle | Steam drilling-machine | mining apparatus | |
| 9,078 | Jun. 29, 1852 | P.M. Hutton, H.R. Remsen | Locomotive-Engine | railroad locomotives | |