HITACHI COMPUTER PERIPHERALS CO., 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 22425
 
  
 
G11B INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER 3135
 
  
 
H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS 176
 
  
 
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
 
  
 
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
9274723 Storage apparatus and its control methodOct 13, 09Mar 01, 16[G06F]
8812800 Storage apparatus and storage management methodJun 24, 10Aug 19, 14[G06F]
8380952 Storage system and data storage method using storage system which decides size of data to optimize the total of data size transfer efficiencyMay 29, 09Feb 19, 13[G06F]
8271444 Storage control device to backup data stored in virtual volumeDec 08, 10Sep 18, 12[G06F]
8259951 Method and system for managing encryption keyApr 01, 08Sep 04, 12[H04L]
8219770 Storage system and data management methodSep 01, 11Jul 10, 12[G06F]
8205054 Hierarchical storage systemJan 09, 09Jun 19, 12[G06F]
8145602 Storage apparatus, data restoration method and computer systemJul 27, 10Mar 27, 12[G06F]
8065271 Storage system and method for backing up dataJan 28, 08Nov 22, 11[G06F]
8037265 Storage system and data management methodFeb 07, 07Oct 11, 11[G06F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
8590042 Storage system, and encryption key management method and encryption key management program thereofExpiredApr 08, 08Nov 19, 13[H04L, G06F]
7748050 Optical disc, illegal copy finding system and method using optical disc, optical disc manufacturing apparatus and optical disc manufacturing methodExpiredFeb 16, 05Jun 29, 10[G06F]
2009/0173,724 PRODUCT LASER IRRADIATION DEVICE, LASER IRRADIATION METHOD AND METHOD FOR MANUFACTURING MODIFIED OBJECTAbandonedMar 16, 07Jul 09, 09[B23K]
7542396 Information recording apparatus, information recording medium and information recording mediumExpiredAug 24, 05Jun 02, 09[G11B]
2009/0100,223 Storage control apparatus, data archive method for storage control apparatus, and storage systemAbandonedFeb 06, 08Apr 16, 09[G06F]
2009/0072,451 Optical disc, illegal copy finding system and method using optical disc, optical disc manufacturing apparatus and optical disc manufacturing methodAbandonedOct 30, 08Mar 19, 09[B29C, G06F]
2008/0270,643 TRANSFER SYSTEM, INITIATOR DEVICE, AND DATA TRANSFER METHODAbandonedJan 14, 08Oct 30, 08[G06F]
2008/0077,739 Storage apparatus, storage system, and data read methodAbandonedFeb 07, 07Mar 27, 08[G06F]
2007/0115,136 Contact signal transmission and reception apparatusAbandonedNov 16, 06May 24, 07[G06F]
2007/0016,313 Power supply controllerAbandonedOct 31, 05Jan 18, 07[G05B]
7106904 Form identification methodExpiredJan 10, 02Sep 12, 06[G06K]
6959359 Software prefetch system and method for concurrently overriding data prefetched into multiple levels of cacheExpiredJun 09, 00Oct 25, 05[G06F]
2003/0222,618 DC backup power supply systemAbandonedApr 14, 03Dec 04, 03[H02J]
6643152 DC power supply deviceExpiredNov 13, 02Nov 04, 03[H02M]
2003/0151,878 Electronic apparatusAbandonedFeb 06, 03Aug 14, 03[H02H]
6507507 DC power supply deviceExpiredOct 31, 01Jan 14, 03[H02M]
2002/0186,576 Backup power supplyAbandonedFeb 27, 02Dec 12, 02[H02M]
5777952 Thin bias magnet unit for magneto-optical recording deviceExpiredJul 11, 96Jul 07, 98[G11B]
5721942 Personal information display system for serving large capacities of general information to user-designated stations at user-designated timesExpiredNov 13, 91Feb 24, 98[G06F]
5689481 Method of accessing multifile storage medium and library systemExpiredOct 19, 93Nov 18, 97[G11B]

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