Hitachi, Ltd. and Hitachi Car Engineering Co., Ltd.

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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
 
  
 
G01L MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE 155

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6167761 Capacitance type pressure sensor with capacitive elements actuated by a diaphragmJun 24, 98Jan 02, 01[G01L]
5824895 Air flow meter of a heating resistor typeSep 08, 97Oct 20, 98[G01F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2003/0183,000 Gas flowmeter and manufacturing method thereofAbandonedSep 18, 02Oct 02, 03[G01F]
2002/0130,576 Permanent magnet rotating electric machine and electrically driven vehicle employing sameAbandonedMay 10, 02Sep 19, 02[H02K]
5785493 Turbocharger for internal combustion engineExpiredDec 20, 96Jul 28, 98[F04D]
5727522 Method and system for controlling ignition timing for internal combustion engineExpiredMar 25, 97Mar 17, 98[F02M]

Top Inventors for This Owner

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