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| All Patents in class 415/63 | |||||
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| Number | Date | Patentee | Title | Type | |
| 171,256 | Dec. 21, 1875 | O.J. Backus | Centrifugal Water-Wheel | water wheels | |
| 925,127 | Jun. 15, 1909 | A. McDonald | Rotary Engine | rotary steam engines | |