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| All Patents in class 418/122 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 69,383 | Oct. 01, 1867 | M.L. Andrew | Improvement in rotary engines | |
 | 89,269 | Apr. 27, 1869 | M.L. Andrew | Improvement in rotary pumps | |
 | 420,331 | Jan. 28, 1890 | A.F. Brown | Rotary Engine | |
| 630,426 | Aug. 08, 1899 | C.F. Thurber | Rotary pump | ||
 | 914,627 | Mar. 09, 1909 | J.S. Alcorn | Rotary engine | |