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| All Patents in class 415/146 | |||||
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| Number | Date | Patentee | Title | Type | |
| 320,725 | Jun. 23, 1885 | L.H. Timmons | Rotary Steam Engine | rotary steam engines | |
| 580,097 | Apr. 06, 1897 | H.D. Williams | Governor for Water Motor | water wheel governors | |
| 1,931,158 | Oct. 17, 1933 | G.A. Biggs | Hydraulic Turbine | turbine water wheels | |