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| All Patents in class 415/219.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 231,253 | Aug. 17, 1880 | J. Austin | Wind Wheel | wind power apparatus | |
| 1,865,503 | Jul. 05, 1932 | G.A. Biggs | Hydraulic Turbine | turbine water wheels | |