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| All Patents in class 415/64 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,232X | Nov. 07, 1835 | J.G. Hotchkiss | Reacting, rotary steam engine | steam engines | |
| 1,223,342 | Apr. 17, 1917 | W.J. London | Elastic Fluid Turbine | steam turbines | |