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| All Patents in class 418/157 | |||||
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| Number | Date | Patentee | Title | Type | |
| 650,661 | May 29, 1900 | V.R. Stewart | Rotary Internal Combustion Engine | rotary engines | |
| 924,832 | Jun. 15, 1909 | R.W. Riordan | Rotary Engine | rotary steam engines | |
| 1,187,628 | Jun. 20, 1916 | I.J. Johnson | Rotary Pump | water pumps | |