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| All Patents in class 137/375 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,224,377 | Dec. 10, 1940 | G.H. Clark | Refrigerating Apparatus | refrigeration apparatus | |
| 2,432,859 | Dec. 16, 1947 | F.Y. Carter | Refrigerant Flow Controlling Means | flow controls | |