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| All Patents in class 123/65PD | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 386,211 | Jul. 17, 1888 | L.H. Nash | Gas Engine | |
| 3,407,790 | Oct. 29, 1968 | M.L. Foreman, A.K. Antonsen | Uniflow Scavenged Engine Having Improved Gaseous Fuel Admission | ||
| 3,411,289 | Nov. 19, 1968 | M.L. Foreman, A.K. Antonsen | Turbocharged Opposed Piston Engine Having Improved Air Charging and Scavenging | ||