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| All Patents in class 60/465 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,916,433 | Jul. 04, 1933 | W.C. Muller | Speed Control Valve | ||
| 3,083,535 | Apr. 02, 1963 | F.G. Krafft, W. Ernst | Hydraulic servo system | ||