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| All Patents in class 137/505.37 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,190,464 | Feb. 13, 1940 | D.D. Wile | Control Device | refrigeration apparatus | |
| 2,198,070 | Apr. 23, 1940 | D.D. Wile | Pressure Valve | valves | |