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| Patents Granted on 1988-11-15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,784,371 | Nov. 15, 1988 | W.L. Kamper | Hydraulic jack having a small diameter bleed part in the cylinder wall | hydraulic jacks | |
| 4,784,894 | Nov. 15, 1988 | E.J. Hummelt, E.E. Kirkham, R. Johnstone | Molded polymer composite | ||