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| All Patents in class 415/173.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 320,725 | Jun. 23, 1885 | L.H. Timmons | Rotary Steam Engine | rotary steam engines | |
| 517,790 | Apr. 03, 1894 | W.M. Byrd | Rotary Steam Engine | rotary steam engines | |
| 3,294,315 | Dec. 27, 1966 | D.N. Stewart, R. Olson | Fan construction | ||