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| All Patents in class 60/443 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,870,501 | Aug. 09, 1932 | W. Ernst | Plural Pressure Pump Control for Hydraulic Presses | ||
| 2,713,772 | Jul. 26, 1955 | H. Horlacher | Hydraulic Transmission and Control for Machine Tool Tables | ||
| 2,832,197 | Apr. 29, 1958 | R.H. Eisengrein, G.H. Hermanson, C.L. Sadler | Pressure regulating apparatus for a hydraulic control system | ||