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| All Patents in class 425/150 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,512,279 | Oct. 21, 1924 | F. Diehl | Means for producing relative movement between members | veneer machines | |
| 4,828,474 | May 09, 1989 | R. Ballantyne | Hydraulic cylinder device for platen spacing indication and control | hydraulic metalworking presses | |
| 5,156,782 | Oct. 20, 1992 | R. Ballantyne | Maintaining press platens in parallel relationship | hydraulic metalworking presses | |