Fischer & Porter Company

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME 158
 
  
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 1241

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5406322 Packet-switched ring network having direct access to low and high bandwidth memoriesDec 21, 92Apr 11, 95[H04N]
5299461 Fluid flowrate measuring apparatusJun 09, 92Apr 05, 94[G01F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5520221 Flowmeter measuring tubeExpiredJan 17, 95May 28, 96[F16L]
5375475 Device to measure the flowrate in a partially full lineExpiredSep 03, 92Dec 27, 94[G01F]
5370000 Magnetic flowmeter with fault detectionExpiredJun 30, 92Dec 06, 94[G01F]
5327787 Electromagnetic flow meter with weirExpiredAug 17, 92Jul 12, 94[G01F]
5325724 Apparatus for measuring the flowrate of a fluidExpiredNov 23, 92Jul 05, 94[G01F]
5301556 Flow measuring apparatusExpiredDec 18, 92Apr 12, 94[G01F]
5271280 Apparatus for measuring the flowrate of a fluidExpiredNov 23, 92Dec 21, 93[G01F]
5235595 Packet switchingExpiredJan 06, 89Aug 10, 93[H04J]
4794372 Two-wire DC signal telemetering systemExpiredAug 24, 87Dec 27, 88[G08B]
4754365 Differential pressure transducerExpiredJun 15, 87Jun 28, 88[G01L, H01G]
4747312 Double-loop Coriolis type mass flowmeterExpiredJul 06, 87May 31, 88[G01F]
4727473 Self-learning mechanism for a set of nested computer graphicsExpiredJan 02, 86Feb 23, 88[G06F]
4565098 Hybrid sensing system for vortex flowmeterExpiredSep 10, 84Jan 21, 86[G01F]
4468971 Ultrasonic flowmeter for clean and dirty fluidsExpiredJul 16, 82Sep 04, 84[G01F]
4434458 Auxiliary channel for direct digital control systemExpiredSep 16, 81Feb 28, 84[G05B, G06F]
4391149 Doppler-type ultrasonic flowmeterExpiredMay 15, 81Jul 05, 83[G01F]
4226117 Vortex-shedding flowmeter having drag-actuated torsional sensorExpiredFeb 21, 79Oct 07, 80[G01F]
4204240 High-voltage impulse driver for electromagnetic flowmeterExpiredOct 26, 78May 20, 80[G01F]

Top Inventors for This Owner

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