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| All Patents in class 415/34 | |||||
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| Number | Date | Patentee | Title | Type | |
| 654,872 | Jul. 31, 1900 | E.F. Cassel | Hydraulic Motor | hydraulic motors | |
| 1,506,111 | Aug. 26, 1924 | M. Crozet-Fourneyron | Self Acting Speed Regulating Device for Turbines | water wheel governors | |
| 1,967,316 | Jul. 24, 1934 | D.A. Meeker | Pump | ||