Bopp & Reuther GmbH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4793192 Electromagnetic pulse receiver for a flow meterExpiredOct 30, 86Dec 27, 88[G01P, G01F]
4770204 Spring-loaded safety valve for gases and vaporExpiredJul 21, 87Sep 13, 88[F16K]
4699359 Shut-off valveExpiredAug 05, 85Oct 13, 87[F16K]
4648279 Method of and device for measuring flow rate by electromagnetic inductionExpiredJun 24, 85Mar 10, 87[G01F]
4643219 Valve for regulating the passage of a fluidExpiredJul 14, 83Feb 17, 87[F16K]
4631951 Arrangement for testing a flow meterExpiredAug 05, 85Dec 30, 86[G01F]
4629160 Shutoff wedge for shutoff valveExpiredDec 06, 84Dec 16, 86[F16K]
4619134 Testing device for flow metersExpiredMay 25, 84Oct 28, 86[G01F]
4607821 Shutoff valveExpiredMar 11, 85Aug 26, 86[F16K]
4579008 Electromagnetic pulse pick-up arrangement in a flow meterExpiredJun 18, 84Apr 01, 86[G01P, G01D]
4517823 Testing device for flowmeterExpiredFeb 07, 83May 21, 85[G01F]
4481974 Safety valve with friction means for damping valve vibrationExpiredSep 27, 82Nov 13, 84[F16K]
4385526 Flow meterExpiredNov 21, 80May 31, 83[G01F]
4362183 Spring loaded safety valveExpiredJun 23, 80Dec 07, 82[F16K]
4357956 Safety valve with vibration-damped valve springExpiredAug 12, 80Nov 09, 82[F16K]

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