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| All Patents in class 137/625.35 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,482,393 | Feb. 05, 1924 | J.C. Glenn | Engine Valve Mechanism | steam engine valves | |
| 1,983,803 | Dec. 11, 1934 | H.G. Mueller | Steam Engine Valve | steam engine valves | |