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| All Patents in class 415/91 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,784X | Jun. 28, 1836 | S. Whitman | Rotary steam-engine | steam engines | |
| 231,411 | Aug. 24, 1880 | W.H. De Loach | Water-wheel | water wheels | |
| 392,017 | Oct. 30, 1888 | R. Emerson | Water Motor | hydraulic motors | |