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| All Patents in class 337/373 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,098,181 | Nov. 02, 1937 | E.J. Dillman | Electric Switch | temperature controls | |
| 2,344,767 | Mar. 21, 1944 | E.J. Dillman | Control Device | industrial control apparatus | |