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| Patents for Oscar H. Ludeman | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,403,427 | Jul. 02, 1946 | O.H. Ludeman | Valve Mechanism | steam valves | |
| 2,414,751 | Jan. 21, 1947 | O.H. Ludeman | Valve | steam engine valves | |