HITACHI COMMUNICATION TECHNOLOGIES, LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G03G ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY 180
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 1446
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 1361
 
  
 
H04B TRANSMISSION 1209

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7941081 Developing unit and image forming apparatus using the sameJan 03, 08May 10, 11[G03G]
7529964 Data duplication method in a disaster recovery systemSep 01, 04May 05, 09[G06F]
6635971 Electronic device and optical transmission moduleJan 11, 02Oct 21, 03[H01L]
5515196 Optical intensity and phase modulators in an optical transmitter apparatusApr 02, 93May 07, 96[H04B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2008/0292,249 ELECTRONIC EQUIPMENTAbandonedJan 30, 08Nov 27, 08[G02B]
7453854 Radio signal communication method, base station and terminal stationExpiredMay 18, 04Nov 18, 08[H04B]
2008/0181,620 CONTROL METHOD FOR OPTICAL PHASE MODULATIONAbandonedJul 12, 07Jul 31, 08[H04B]
2007/0195,804 PPP GATEWAY APPARATUS FOR CONNECTING PPP CLIENTS TO L2SWAbandonedNov 15, 06Aug 23, 07[H04L]
2007/0172,239 Optical transmission systemAbandonedSep 26, 06Jul 26, 07[H04J]
2007/0086,384 Method of setting up quality of service in wireless communication network and wireless communication apparatusAbandonedSep 06, 06Apr 19, 07[H04Q]
2007/0065,089 Optical termination apparatus and optical transmission systemAbandonedAug 15, 06Mar 22, 07[G02B]
2007/0025,309 Home agent apparatus and communication systemAbandonedJan 10, 06Feb 01, 07[H04Q]
2006/0239,855 Reflow soldering method using Pb-free solder alloy and hybrid packaging method and structureAbandonedJul 01, 04Oct 26, 06[C22C]
2006/0092,941 Communication path monitoring system and communication network systemAbandonedJul 07, 05May 04, 06[H04L]
2006/0050,643 Router for multicast redundant routing and system for multicast redundancyAbandonedJul 15, 05Mar 09, 06[H04L]
2005/0286,510 Packet transfer apparatusAbandonedAug 23, 04Dec 29, 05[H04L, H04Q]
2005/0288,025 Radio communication system and base stationAbandonedJan 19, 05Dec 29, 05[H04Q]
2005/0157,722 Access user management system and access user management apparatusAbandonedJul 20, 04Jul 21, 05[H04L]
2005/0128,946 Network statistics information service system and internet access serverAbandonedJul 26, 04Jun 16, 05[H04L]
6862290 Line switching system and line switching unit of dynamic band variation unitExpiredMay 06, 99Mar 01, 05[H04L]
2005/0036,788 Optical network system construction method and support systemAbandonedJun 01, 04Feb 17, 05[H04J]
2005/0007,994 Mobile IP data communication systemAbandonedJun 21, 04Jan 13, 05[H04L, H04J]
2004/0264,421 Cell station, radio communication system, communication control method of cell station, and method of building radio communication networkAbandonedJan 08, 04Dec 30, 04[H04J]
2004/0246,991 IP address translator and packet transfer apparatusAbandonedAug 22, 03Dec 09, 04[H04J]

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