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| All Patents in class 62/474 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,192,117 | Feb. 27, 1940 | D.D. Wile | Control Device | temperature controls | |
| 2,415,338 | Feb. 04, 1947 | F.Y. Carter | Refrigeration System and Expansion Valve Therefor | refrigeration apparatus | |