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| All Patents in class 415/55.4 | |||||
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| Number | Date | Patentee | Title | Type | |
| 320,725 | Jun. 23, 1885 | L.H. Timmons | Rotary Steam Engine | rotary steam engines | |
| 2,042,499 | Jun. 02, 1936 | F.E. Brady | Rotary pump | rotary pumps | |
| 2,217,211 | Oct. 08, 1940 | F.E. Brady | Rotary pump | rotary pumps | |
| 2,277,210 | Mar. 24, 1942 | R.V. Cook | Peripheral Pump | centrifugal pumps | |
| 2,578,780 | Dec. 18, 1951 | C.D. Bower | Rotary Pump Seal | rotary pumps | |