Hitachi Keiyo Engineering Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G11C STATIC STORES 6145
 
  
 
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 399
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 2445
 
  
 
B23K SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 192
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 1361
 
  
 
H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS 186
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 1284

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7110548 Cryptographic communication method, encryption algorithm shared control method, encryption algorithm conversion method and network communication systemAug 02, 99Sep 19, 06[H04L]
6486548 Semiconductor module and power converting apparatus using the moduleApr 20, 00Nov 26, 02[H01L]
6421279 Flash memory control method and apparatus processing system therewithAug 13, 01Jul 16, 02[G11C]
6275436 Flash memory control method and apparatus processing system therewithMay 23, 00Aug 14, 01[G11C]
6194856 Motor driving apparatus including a modularized current control circuit and method of controlling the sameJan 24, 00Feb 27, 01[H02M, H02P]
6169670 Inverter apparatus operatable over extended frequency range while suppressing output errorApr 05, 00Jan 02, 01[H02M]
D429401 KioskSep 29, 99Aug 08, 00[1402]
6078520 Flash memory control method and information processing system therewithJul 21, 99Jun 20, 00[G11C]
5973964 Flash memory control method and information processing system therewithOct 30, 98Oct 26, 99[G11C]
5949663 Inverter apparatus capable of readily modification of the specification and performance thereofJun 18, 98Sep 07, 99[H02M]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7115039 Contents distribution system for simulation ride system, distribution apparatus for ride contents administration center, simulation ride control apparatus and computer softwareExpiredAug 31, 01Oct 03, 06[A63G]
2004/0260,950 Cryptographic communication method, encryption algorithm shared control method, encryption algorithm conversion method and network communication systemAbandonedMar 29, 04Dec 23, 04[H04L]
6675167 System and method for managing monitoring equipmentExpiredMar 19, 01Jan 06, 04[G06F]
6604061 Instruments management system and method and monitoring apparatus, database apparatus and data base client apparatuses and recording mediumExpiredFeb 28, 02Aug 05, 03[G06F]
6413090 VR motion base control apparatus and it's supporting structureExpiredMar 26, 99Jul 02, 02[G09B]
6409509 VR motion base control apparatus and it's supporting structureExpiredJan 26, 01Jun 25, 02[G09B]
6336811 VR motion base control apparatus and it's supporting structureExpiredJan 26, 01Jan 08, 02[A63J, A63G]
5557774 Method for making test environmental programsExpiredMar 17, 94Sep 17, 96[G06F]
5481664 Method of controlling information in multimedia systemExpiredJan 19, 93Jan 02, 96[G06T]
5274750 Robot teaching apparatus and method with skill level storageExpiredFeb 04, 91Dec 28, 93[G06F]
5262954 Automated manufacture lineExpiredMay 08, 91Nov 16, 93[G06F]
5255347 Neural network with learning functionExpiredApr 23, 91Oct 19, 93[G10L]
5200678 Motor driving control apparatusExpiredNov 06, 90Apr 06, 93[G05B]
5195179 Coordinate input apparatusExpiredMay 21, 90Mar 16, 93[G06F]
5157315 Method of controlling robot movementsExpiredJun 08, 90Oct 20, 92[G05B]
5144555 Method and apparatus for supporting of making formatted documentExpiredNov 13, 90Sep 01, 92[G06F]
5034991 Character recognition method and systemExpiredApr 06, 90Jul 23, 91[G06K]
RE33519 Method and apparatus for controlling induction motorExpiredAug 22, 89Jan 15, 91[H02P]
4954762 Method and apparatus for controlling tracking path of working point of industrial robotExpiredJan 30, 90Sep 04, 90[G06F]
4916286 Method and an apparatus for controlling work performed by an automatic work processing machineExpiredJan 12, 88Apr 10, 90[B23K]

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