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| All Patents in class 92/12.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,383,093 | Aug. 21, 1945 | G.A. Wahlmark | Fluid pressure generating means | ||
| 2,470,617 | May 17, 1949 | W.M. Hoddinott | Control for Variable Displacement Pumps | milling machines | |