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| All Patents in class 415/172.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 172,140 | Jan. 11, 1876 | J.L. Brown, J.B. McCormick | Turbine Water-Wheel | turbine water wheels | |
| 1,114,238 | Oct. 20, 1914 | W.A. Doble | Adjustable Wear Ring | water wheels | |
| 2,727,680 | Dec. 20, 1955 | R.D. Madison, H.C. Burgin, W.R. Elliot, R.D. Robson | Centrifugal fan | ||