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| All Patents in class 418/182 | |||||
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| Number | Date | Patentee | Title | Type | |
| 79,781 | Jul. 07, 1868 | S.P. Ruggles | Improvement in Rotary Fluid-Elevators | rotary pumps | |
| 816,285 | Mar. 27, 1906 | I. Abbott | Rotary Engine | rotary steam engines | |
| 878,543 | Feb. 11, 1908 | W. Krygowski | Steam Engine | steam engines | |