HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G11B INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER 30526
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 14433
 
  
 
H03M CODING, DECODING OR CODE CONVERSION, IN GENERAL 11100
 
  
 
B05D PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL 681
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM6151
 
  
 
C23C COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL 695
 
  
 
H01F MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 579
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 5280
 
  
 
H03H IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS 467
 
  
 
B44C PRODUCING DECORATIVE EFFECTS 331

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8117518 Signal processing apparatus and a data recording and reproducing apparatus including local memory processorDec 21, 07Feb 14, 12[G06F]
8089717 Data reproducing apparatus for improving data recording efficiencyAug 15, 00Jan 03, 12[G11B]
8085499 Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using itSep 23, 10Dec 27, 11[G11B]
7982999 Information storing device and method for controlling same to record/reproduce information by selecting one of working modesFeb 07, 05Jul 19, 11[G11B]
7903374 Magnetic recording and reading deviceJun 15, 10Mar 08, 11[G11B]
7885039 Magnetic head supporting mechanism with regulating member which prevents over angulation of the slider supportNov 05, 08Feb 08, 11[G11B]
7865799 Recording format for information date, information recording/reproducing cording circuitAug 19, 08Jan 04, 11[H03M]
7839590 Method of servo writing for magnetic recording system, magnetic recording systemSep 09, 08Nov 23, 10[G11B]
7817367 Apparatus, signal-processing circuit and device for magnetic recording systemSep 17, 08Oct 19, 10[G11B]
7813079 Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using itOct 21, 08Oct 12, 10[G11B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
8345371 Information storing device and method for controlling same to record/reproduce information by selecting one of working modesExpiredOct 20, 10Jan 01, 13[G11B]
8144415 Apparatus, signal-processing circuit and device for magnetic recording systemExpiredSep 14, 10Mar 27, 12[G11B]
7643245 Magnetic disc unit with gap between magnetic disc and shroudExpiredDec 21, 07Jan 05, 10[G11B]
7625646 Perpendicular magnetic recording medium and method of manufacturing itExpiredFeb 15, 06Dec 01, 09[G11B]
7589937 Thin film magnetic head with high Fe alloy plating film and manufacturing method thereofExpiredJul 19, 04Sep 15, 09[G11B]
7545595 Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angleExpiredFeb 16, 06Jun 09, 09[G11B]
7515380 Magnetic head and method for production thereforExpiredMar 13, 07Apr 07, 09[G11B]
7510789 Perpendicular magnetic recording mediaExpiredJun 09, 05Mar 31, 09[G11B]
7511919 Magnetic disk apparatusExpiredJan 28, 05Mar 31, 09[G11B]
7475470 Method for manufacturing a magnetic head for perpendicular recordingExpiredFeb 10, 04Jan 13, 09[G11B]
7474493 Alternative DC-burst servo pattern for perpendicular recordingExpiredNov 06, 03Jan 06, 09[G11B]
7440228 Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using itWithdrawnMay 22, 07Oct 21, 08[G11B]
7436611 Method of servo writing for magnetic recording system, magnetic recording systemExpiredMar 17, 06Oct 14, 08[G11B]
7426091 Magnetic headExpiredMar 31, 06Sep 16, 08[G11B]
7405905 Perpendicular magnetic recording and reproducing headExpiredSep 08, 06Jul 29, 08[G11B]
7399540 Perpendicular magnetic recording media, magnetic recording apparatusExpiredOct 18, 06Jul 15, 08[G11B]
7385786 Magnetic head slider and a magnetic disk device in which the slider is mountedExpiredJun 26, 06Jun 10, 08[]
7382576 Thin film magnetic head and magnetic disk apparatus including the sameExpiredMay 04, 06Jun 03, 08[G11B]
7375917 Idle seek calibration method for magnetic disk drive and magnetic disk drive with an intermission calibrationExpiredMar 02, 00May 20, 08[G11B]
7370405 Fabrication method of a high gradient-field recording head for perpendicular magnetic recordingExpiredMar 15, 05May 13, 08[G11B]

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