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| All Patents in class 418/258 | |||||
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| Number | Date | Patentee | Title | Type | |
| 23,929 | May 10, 1859 | S.D. Lount | Rotary Steam Engine | rotary steam engines | |
| 456,351 | Jul. 21, 1891 | W.G. Adams | Rotary Engine | rotary steam engines | |
| 465,907 | Dec. 29, 1891 | W.N. Whipple | Rotary Steam Engine | rotary steam engines | |