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| All Patents in class 418/127 | |||||
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| Number | Date | Patentee | Title | Type | |
| 204,430 | Jun. 04, 1878 | B. Frese | Rotary Engine | rotary steam engines | |
| 293,511 | Feb. 12, 1884 | J.H. Phelps | Rotary Engine | rotary steam engines | |