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| All Patents in class 418/139 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 23,466 | Apr. 05, 1859 | D. Hughes | Rotary Steam Engine | ||
| 293,511 | Feb. 12, 1884 | J.H. Phelps | Rotary Engine | ||
| 444,834 | Jan. 20, 1891 | J.W. Hayes | Rotary Engine | ||
| 507,780 | Oct. 31, 1893 | A.F. Brown | Rotary Engine, Pump & Blower | ||
| 630,426 | Aug. 08, 1899 | C.F. Thurber | Rotary pump | ||
| 644,814 | Mar. 06, 1900 | J. Brons | Rotary Engine | ||
| 714,425 | Nov. 25, 1902 | J.F. Williams | Rotary Engine | ||
 | 968,268 | Aug. 23, 1910 | A.C. Savidge | Rotary Engine | |