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| All Patents in class 425/451.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,759,280 | Jul. 26, 1988 | L. Malashenko | Hydraulic press with adjustable platen clearance | hydraulic metalworking presses | |
| 5,237,916 | Aug. 24, 1993 | L. Malashenko | Regenerative hydraulic cylinders with internal flow paths | hydraulic metalworking presses | |