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| All Patents in class 200/83Q | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,225,587 | Dec. 17, 1940 | E.J. Dillman | Control Device | flow controls | |
| 2,628,296 | Feb. 10, 1953 | E.J. Dillman | Flow Switch | flow controls | |