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| All Patents in class 418/187 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 24,388 | Jun. 14, 1859 | D.D. Hardy | Rotary Steam Engine | ||
| 453,043 | May 26, 1891 | G. Flitz, J. Flitz, E. Flitz | Rotary Motor | ||
 | 1,199,229 | Sep. 26, 1916 | B.F. Augustine | Rotary Explosion Engine | |
 | 1,965,388 | Jul. 03, 1934 | P.O. Ott | Rotary Pump | |