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| All Patents in class 418/239 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 6,482X | Apr. 16, 1831 | J. Beckwith | Pump or engine for raising water and ejecting air | ||
 | 260,978 | Jul. 11, 1882 | R. Hodson | Rotary Engine | |
| 459,424 | Sep. 15, 1891 | G.A. Thomson | Rotary Engine | ||
| 816,288 | Mar. 27, 1906 | D.F. Baker | Rotary Engine | ||