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| All Patents in class 123/188.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 909,214 | Jan. 12, 1909 | G.B. Petsche | Admission Valve for Gas Engines | internal combustion engine valves | |
| 1,102,675 | Jul. 07, 1914 | J.D. Lowe | Internal-Combustion Engine | internal combustion engine lubrication | |
| 1,231,572 | Jul. 03, 1917 | F.M. Davis | Valve mechanism | internal combustion engine valves | |