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| All Patents in class 62/224 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,077,865 | Apr. 20, 1937 | D.D. Wile | Refrigerating System | refrigeration apparatus | |
| 2,192,117 | Feb. 27, 1940 | D.D. Wile | Control Device | temperature controls | |