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| All Patents in class 415/197 | |||||
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| Number | Date | Patentee | Title | Type | |
| 201,511 | Mar. 19, 1878 | W.F. Eyster | Water Motor | hydraulic motors | |
| 501,598 | Jul. 18, 1893 | W.M. Byrd | Rotary Steam Engine | rotary steam engines | |
| 798,106 | Aug. 29, 1905 | C.V. Kerr | Steam Turbine Nozzle | steam turbines | |