Physics International Company

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5489818 High power compact microwave sourceExpiredMay 22, 89Feb 06, 96[H01J, H03B, H01P]
5269223 Piezoelectric fuse system with safe and arm device for ammunitionExpiredOct 06, 92Dec 14, 93[F42C]
4663567 Generation of stable linear plasmasExpiredOct 28, 85May 05, 87[G21G]
4494043 Imploding plasma deviceExpiredJul 02, 81Jan 15, 85[H01J]
4397285 Closed loop diesel engine controlExpiredJul 15, 81Aug 09, 83[F02M]
4359660 Series diode X-ray sourceExpiredDec 15, 80Nov 16, 82[H01J]
4318023 Sagittally amplified piezoelectric actuatorExpiredFeb 21, 80Mar 02, 82[H01L]
4271989 Micro-metering systemExpiredMar 27, 79Jun 09, 81[G01F]
4231287 Spring diaphragmExpiredMay 01, 78Nov 04, 80[F01B, F16J]
4219755 Electromotive actuatorExpiredMar 18, 77Aug 26, 80[H01L]

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