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| All Patents in class 418/260 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 5,574X | Jul. 16, 1829 | J. Mount | Application of Steam to Produce Rotary Motion | ||
| 204,430 | Jun. 04, 1878 | B. Frese | Rotary Engine | ||
 | 315,318 | Apr. 07, 1885 | J. Moffet | Reversible engine | |
 | 440,491 | Nov. 11, 1890 | J. Moffet | Reversible engine | |
| 583,897 | Jun. 08, 1897 | M.P. Elgen | Rotary Engine | ||
 | 798,485 | Aug. 29, 1905 | B.F. Augustine | Rotary Engine | |
 | 990,163 | Apr. 18, 1911 | J.W. von Pittler | Rotary engine | |