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| All Patents in class 236/91F | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,980,789 | Nov. 13, 1934 | E.J. dill | Control Apparatus | ||
| 2,242,334 | May 20, 1941 | D.D. Wile | Refrigerating System | ||
| 2,396,559 | Mar. 12, 1946 | E.J. Dillman | Air Cooling Apparatus | ||