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| Patents Granted on 1997-03-11 | |||||
| Number | Date | Patentee | Title | Type | |
| 5,610,327 | Mar. 11, 1997 | M.M. Crass, M.A. Hoferitza, T.P. Becker | Knock Sensor-Triggered Timing Light with Visible Laser Retro-Reflecting Control | ||