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| Patents Granted on 1989-01-24 | |||||
| Number | Date | Patentee | Title | Type | |
| 4,800,378 | Jan. 24, 1989 | R.O. Quinn, D.W. Weidenbenner, G. Lindhard, G.D. Jonker, C.F. Govekar, L.J. Wisneski, M.C. Putrow | Digital Engine Analyzer | ||