HITACHI TELECOM TECHNOLOGIES, LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04J MULTIPLEX COMMUNICATION 1124
 
  
 
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
5987039 Multiplexing system for ISDN circuitsNov 27, 96Nov 16, 99[H04J]
5471525 Line status display system for telephone exchange systemSep 23, 94Nov 28, 95[H04M]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7058060 ATM apparatus, IP apparatus and bus systemExpiredSep 21, 01Jun 06, 06[H04L]
7050438 Cell creation method for control line signals of ATM Network and multiplexing equipmentExpiredMar 08, 00May 23, 06[H04J]
7035265 Multiplexer and priority control method for packet data transmissionsExpiredSep 21, 01Apr 25, 06[H04L]
2004/0213,245 Communication apparatus having shaping functionAbandonedFeb 20, 01Oct 28, 04[H04L]
6772373 Disorder detecting deviceExpiredMar 07, 01Aug 03, 04[G06F]
6646712 Command system for performing centralized management of data in a command deskExpiredJan 13, 00Nov 11, 03[H04M]
6507578 Channel division control equipment of the ISDN primary rate interface circuitExpiredJun 01, 00Jan 14, 03[H04L]
6487279 Telephone terminal and telephone exchange system accommodating the terminalExpiredMar 09, 00Nov 26, 02[H04M]
6477241 Sound recording controller for dealing speaking systemExpiredJul 14, 99Nov 05, 02[H04M]
6408055 Electronic mail pop-up control systemExpiredJun 10, 99Jun 18, 02[H04M]
6263000 Remote trading call terminals in a trading call systemExpiredDec 27, 96Jul 17, 01[H04M]
6263062 Dealing call terminal deviceExpiredOct 07, 98Jul 17, 01[H04M]
6215794 Multiple band change-over method for multiplex communication equipmentExpiredSep 11, 97Apr 10, 01[H04J]
6192047 Time division multiple equipmentExpiredMar 02, 98Feb 20, 01[H04L, H04Q, H04J]
5999516 Multiplex communication equipment and communication test method thereofExpiredSep 11, 97Dec 07, 99[H04M, G08C, G01R]
5905551 Electric appliance, its assembling method, and its housing structureExpiredDec 10, 97May 18, 99[G02F]
5838402 Electric appliance, its assembling method, and its housing structureExpiredAug 28, 96Nov 17, 98[G02F]
5719855 Digital telephone switching system having plural terminal devices directly connected to a common digital lineExpiredJan 11, 96Feb 17, 98[H04J]
5666409 Dealing boardExpiredMar 27, 95Sep 09, 97[H04M]
5661793 Key unitExpiredSep 11, 95Aug 26, 97[H04M]

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