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| All Patents in class 337/317 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,965,543 | Jul. 03, 1934 | E.J. Dillman, L.W. Eggleston | Control Device | ||
| 1,994,988 | Mar. 19, 1935 | L.W. Eggleston | Control Device | ||
| 2,088,163 | Jul. 27, 1937 | E.J. Dillman | Control Device | ||
| 2,168,545 | Aug. 08, 1939 | D.D. Wile | Control Device | ||
| 2,589,063 | Mar. 11, 1952 | E.J. Dillman | Thermostatic Switch | ||