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| All Patents in class 418/124 | |||||
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| Number | Date | Patentee | Title | Type | |
| 449,864 | Apr. 07, 1891 | J.E. Sackett | Rotary Steam Engine | rotary steam engines | |
| 464,162 | Dec. 01, 1891 | M.J. Mapes | Rotary Steam Engine | rotary steam engines | |