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| All Patents in class 418/211 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 9,068X | Sep. 09, 1835 | J. Bennock | Steam engine | ||
| 40,278 | Oct. 13, 1863 | A. Ramsdell | Rotary Steam Engine | ||
| 905,476 | Dec. 01, 1908 | E.W. Gragert, F. Stoehr | Rotary Engine | ||