Hitachi Process Computer Engineering, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 5442
 
  
 
G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS 2131
 
  
 
G09G ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION 2149
 
  
 
H04J MULTIPLEX COMMUNICATION 2123
 
  
 
G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS198
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
H01H ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES 193

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6034749 Light insensitive type active matrix with P and N regions connected to a reference potentialJun 07, 95Mar 07, 00[G02F]
5901281 Processing unit for a computer and a computer system incorporating such a processing unitMay 03, 95May 04, 99[G06F]
5740424 Information processing system and method using time-varying database altering informationAug 02, 96Apr 14, 98[G06F]
5706422 Method of locating fault of communication systemJul 16, 96Jan 06, 98[G06F]
5699521 Communication system and communication methodMar 22, 95Dec 16, 97[G06F]
5594350 Signal detecting circuit for digital controllerDec 01, 94Jan 14, 97[G01R]
5585821 Apparatus and method for screen displayDec 20, 95Dec 17, 96[G09G]
5461501 Liquid crystal substrate having 3 metal layers with slits offset to block light from reaching the substrateOct 06, 93Oct 24, 95[G02F]
5432715 Computer system and monitoring methodJun 29, 93Jul 11, 95[G01B]
5396485 Information communication system for point-to-point communication and point-to-multipoint communication using same linesAug 24, 93Mar 07, 95[H04J]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6975648 Network system and communication band control method thereofExpiredMar 24, 04Dec 13, 05[H04J]
6879358 LCD and projection type display using sameExpiredOct 31, 03Apr 12, 05[G02F]
6798787 Network system and communication band control method thereofExpiredFeb 27, 01Sep 28, 04[H04J]
6693691 LCD and projection type display using sameExpiredJul 11, 02Feb 17, 04[G02F]
6686976 Liquid crystal light valve and projection type display using sameExpiredJun 01, 01Feb 03, 04[G02F]
6437842 LCD and projection type display using three metalization layers and black layerExpiredDec 16, 99Aug 20, 02[G02F]
2001/0010,542 IMAGE PROCESSOR, INTRUDER MONITORING APPARATUS AND INTRUDER MONITORING METHODAbandonedSep 18, 97Aug 02, 01[H04N]
6216236 Processing unit for a computer and a computer system incorporating such a processing unitExpiredNov 10, 98Apr 10, 01[G06F, G01R]
5890220 Address conversion apparatus accessible to both I/O devices and processor and having a reduced number of index buffersExpiredMay 31, 95Mar 30, 99[G06F]
5787464 Computer system including a dual memory configuration which supports on-line memory extraction and insertionExpiredFeb 03, 97Jul 28, 98[G06F]
5651112 Information processing system having performance measurement capabilitiesExpiredFeb 22, 96Jul 22, 97[G06F]
5497374 Data transmission method and system thereofExpiredSep 02, 94Mar 05, 96[H04L]
5426638 Transmission method and system thereofExpiredMar 19, 90Jun 20, 95[H04J]
5418404 Data processing device and plug-in packageExpiredJun 14, 94May 23, 95[H01R]
5293462 Electronic information processing method and device for modifying electronic information without losing high quality thereofExpiredMar 20, 90Mar 08, 94[G06F]
5247619 Insertion and removal of a circuit device into a bus networkExpiredJul 05, 89Sep 21, 93[G06F]
5210632 Signal transmission system having a star coupled repeaterExpiredMay 22, 90May 11, 93[H04B]
4918561 Housing for electronic apparatusExpiredOct 06, 88Apr 17, 90[H65K]
4887230 Cursor display apparatusExpiredFeb 17, 88Dec 12, 89[G06F]
4855993 Method and apparatus for detecting a fault in a ring network data transmission systemExpiredFeb 22, 88Aug 08, 89[H04L]

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