OHL, JOHN P.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4675684 Distance measuring receiver system and methodExpiredSep 19, 86Jun 23, 87[G01S]
4552106 Internal combustion engineExpiredDec 03, 82Nov 12, 85[F02B]
4283726 Dual frequency distance measuring systemExpiredSep 05, 78Aug 11, 81[G01S]
4268807 Band-pass filter and gain stageExpiredJul 13, 78May 19, 81[H03H]
4182996 Magnetic R.F. power splitter and power combinerExpiredMar 09, 78Jan 08, 80[H01P]

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