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