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| All Patents in class 123/25R | |||||
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| Picture | Number | Date | Patentee | Title | |
| 249,214 | Nov. 08, 1881 | W.H. Wigmore | Combined Gas, Air and Steam Rotary Engine | ||
 | 289,692 | Dec. 04, 1883 | L.H. Nash | Gas Engine | |
| 1,165,028 | Dec. 21, 1915 | H.F. Shepherd | Water and Feed Pump for Hydrocarbon Engines | ||
 | 2,407,478 | Sep. 10, 1946 | H.E. Crozier, A.G. Vanderpoel | Antiknock or detonation dampening device | |