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| All Patents in class 415/209.3 | |||||
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| Number | Date | Patentee | Title | Type | |
| 925,218 | Jun. 15, 1909 | J.P. Nikonow | Elastic Fluid Turbine | steam turbines | |
| 1,384,286 | Jul. 12, 1921 | L.E. Whiton, H.B. Lee | Steam-turbine | steam motors | |