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| All Patents in class 418/186 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,015 | Mar. 26, 1841 | J. Tuttle | Rotary Steam Engine | rotary steam engines | |
| 3,039 | Apr. 10, 1843 | W.S. Rider, A.K. Rider | Rotary steam-engine | rotary steam engines | |
| 15,281 | Jul. 08, 1856 | T. Turton, J.M. Colman | Rotary Steam Engine | rotary steam engines | |
| 23,466 | Apr. 05, 1859 | D. Hughes | Rotary Steam Engine | rotary steam engines | |
| 1,861,168 | May 31, 1932 | W. Warren, J.H. Warren, E.C. Warren | Rotary Engine | rotary steam engines | |