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| All Patents in class 418/68 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,678,049 | Jul. 24, 1928 | E.J. Kearney | Fluid Control Device | machine tool controls | |
| 1,678,050 | Jul. 24, 1928 | E.J. Kearney | Adjustable Fluid Control Device | machine tool controls | |