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| All Patents in class 416/236R | |||||
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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 | |
| 3,074,489 | Jan. 22, 1963 | R.R. Annis | Variable pitch fan for small motors | ||