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| All Patents in class 418/65 | |||||
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| Number | Date | Patentee | Title | Type | |
| 208,559 | Oct. 01, 1878 | H.C. Powell, W.E. Bartrum | Rotary-Engines, &c. | rotary steam engines | |
| 454,738 | Jun. 23, 1891 | E.F. Holmgreen | Rotary Engine | rotary steam engines | |