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| All Patents in class 60/466 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,996,466 | Apr. 02, 1935 | H. Ernst | Pressure Responsive Hydraulic Feed Control Mechanism | ||
| 2,682,748 | Jul. 06, 1954 | W. Ernst | Restrictor Valve for a Servomotor Circuit | ||