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| All Patents in class 415/83 | |||||
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| Number | Date | Patentee | Title | Type | |
| 627,782 | Jun. 27, 1899 | G.C. Pyle | Rotary Engine Governor | steam engine governors | |
| 712,626 | Nov. 04, 1902 | G. Westinghouse | Rotary Engine | rotary steam engines | |
| 816,147 | Mar. 27, 1906 | J.K. Broderick | Rotary Motor | rotary engines | |
| 1,095,506 | May 05, 1914 | W.J. London | Elastic Fluid Turbine | steam turbines | |