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| All Patents in class 123/41.81 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 563,140 | Jun. 30, 1896 | W.F. Davis | Cylinder for Explosive Engines | |
| 593,859 | Nov. 16, 1897 | A. Rosenberg | Gas Engine | ||
| 605,583 | Jun. 14, 1898 | R.L. Merritt | Internal Combustion Engine | ||
 | 640,667 | Jan. 02, 1900 | J.W. Lambert | Gas-engine cylinder | |
| 660,073 | Oct. 16, 1900 | W.F. Davis | Means for Cooling Explosive-Engines | ||
 | 1,503,640 | Aug. 05, 1924 | H.L. Allen, C.E. Curtiss | Internal Combustion Engine | |
| 2,703,077 | Mar. 01, 1955 | A.K. Antonsen | Engine Cylinder Structure | ||