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| All Patents in class 415/115 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,942,995 | Jan. 09, 1934 | G.A. Biggs | Hydraulic Turbine | turbine water wheels | |
| 5,213,468 | May 25, 1993 | V.J. Beaty, J.H. Sexton | Bearing Flushing System | rotary pumps | |