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| All Patents in class 60/376 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,998,003 | Apr. 16, 1935 | L.F. Nenninger, C.W. Goodrich, H. Ernst | Hydraulic Feed Control | hydraulic apparatus | |
| 2,085,303 | Jun. 29, 1937 | H. Ernst | Hydraulic Circuit Control Mechanism | hydraulic apparatus | |
| 2,352,184 | Jun. 27, 1944 | E.P. Bullard | Control Mechanism | ||