HITACHI MICROCOMPUTER ENGINEERING LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 13434
 
  
 
G11C STATIC STORES 3148
 
  
 
G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR166
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
G09G ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION 1150
 
  
 
H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF 1101
 
  
 
H04M TELEPHONIC COMMUNICATION 1162

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5680631 Data processor with on-chip cache memory and purge controller responsive to external signal for controlling access to the cache memoryNov 18, 92Oct 21, 97[G06F]
RE35313 Semiconductor integrated circuit with voltage limiter having different output ranges from normal operation and performing of aging testsApr 28, 92Aug 13, 96[H02M, G01R]
5509133 Data processing system with an enhanced cache memory controlMay 05, 95Apr 16, 96[G06F]
5502825 Data processing system with an enhanced cache memory controlMar 29, 95Mar 26, 96[G06F]
5497482 Data processor in which external sync signal may be selectively inhibitedSep 07, 94Mar 05, 96[G06F]
5493686 Data processor in which external sync signal may be selectively inhibitedMay 03, 95Feb 20, 96[G06F]
5479625 Ring systolic array system for synchronously performing matrix/neuron computation using data transferred through cyclic shift register connected in cascade of traysDec 11, 91Dec 26, 95[G06F]
5414825 Method of programming a semiconductor memory device within a microcomputer address spaceMar 21, 94May 09, 95[G11C]
5398047 Semiconductor integrated circuit device including high-speed operating circuit and low-speed operating circuit, and system using the sameAug 30, 93Mar 14, 95[G09G]
5398319 Microprocessor having apparatus for dynamically controlling a kind of operation to be performed by instructions to be executedSep 11, 92Mar 14, 95[G06F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6381680 Data processing system with an enhanced cache memory controlExpiredJun 01, 98Apr 30, 02[G06F]
6272596 Data processorExpiredSep 15, 99Aug 07, 01[G06F]
5974533 Data processorExpiredJul 10, 98Oct 26, 99[G06F]
5822761 Data processing system which controls operation of cache memory based and the address being accessedExpiredFeb 06, 97Oct 13, 98[G06F]
5809274 Purge control for ON-chip cache memoryExpiredJul 01, 97Sep 15, 98[G06F]
5712859 Semiconductor integrated circuitExpiredSep 03, 96Jan 27, 98[G01R]
5638508 Method and a system for processing a log recordExpiredMar 09, 94Jun 10, 97[G06F]
5619677 Data processing system with an enhanced cache memory controlExpiredMay 17, 96Apr 08, 97[G06F]
5581698 Semiconductor integrated circuit device with test mode for testing CPU using external SignalExpiredApr 15, 93Dec 03, 96[G06F]
5493656 Microcomputer with dynamic bus controlsExpiredMay 02, 95Feb 20, 96[G06F]
5468998 Resin molded type semiconductor device having a conductor filmExpiredAug 22, 94Nov 21, 95[H01L]
5379423 Information life cycle processor and information organizing method using itExpiredJun 01, 93Jan 03, 95[G06F]
5341481 Method and apparatus for dynamically changing bus size using address register means and comparator means as bus size detectorsExpiredApr 28, 93Aug 23, 94[G06F]
5299287 Information processing systemExpiredFeb 21, 92Mar 29, 94[G06F]
5293077 Power switching circuitExpiredJul 27, 92Mar 08, 94[H05B, G05F, B60L]
5274809 Task execution control method for a multiprocessor system with enhanced post/wait procedureExpiredSep 03, 92Dec 28, 93[G06F]
5269674 Dough dividerExpiredJul 10, 92Dec 14, 93[A21C]
5265045 Semiconductor integrated circuit device with built-in memory circuit groupExpiredNov 15, 91Nov 23, 93[G11C]
5261065 Input/output processing method in a database management systemExpiredMar 09, 90Nov 09, 93[G06F]
5257352 Input/output control method and systemExpiredJul 05, 90Oct 26, 93[G06F]

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