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| All Patents in class 91/496 | |||||
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| Number | Date | Patentee | Title | Type | |
| RE12,631 | Apr. 09, 1907 | J.L. Strickland | Rotary engine | rotary steam engines | |
| 1,484,960 | Feb. 26, 1924 | C.H. Peck | Motor | pneumatic motors | |
| 2,021,354 | Nov. 19, 1935 | W. Ernst | External Adjustment for Hydraulic Pump Bearings | hydraulic pumps | |