KDD SUBMARINE CABLE SYSTEMS INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01S DEVICES USING STIMULATED EMISSION389
 
  
 
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
6867908 Optical amplifier having various control circuitryMar 31, 03Mar 15, 05[H01S]
6804469 Supervisory system of optical amplifier repeater system and supervisory method of optical amplifier repeater systemJun 27, 01Oct 12, 04[H04B]
6614588 Optical amplifier having various control circuitryNov 29, 00Sep 02, 03[H01S]
6188508 Control signal superimposerJun 03, 99Feb 13, 01[H01S]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7177540 Method for upgrading an optical transmission system and an optical transmitterExpiredJul 29, 04Feb 13, 07[H04B]
2005/0226,622 Underwater repeater employing rare earth element doped fiber amplifier, Raman assist and optical pump source sparingAbandonedApr 06, 04Oct 13, 05[H04J]
6870859 Multiplexing system and multiplexing method of tributary signalsExpiredMar 03, 00Mar 22, 05[H04Q]
6868514 FEC frame structuring method and FEC multiplexerExpiredOct 09, 01Mar 15, 05[H03M]
6782201 Four fiber ring network optical switching circuit using branched inputsExpiredDec 07, 00Aug 24, 04[H04B, H04J]
6775478 Optical TDM multiplexer, optical TDM demultiplexer, WDM/TDM converter and TDM/WDM converterExpiredMar 23, 01Aug 10, 04[H04B, H04J]
6768872 Optical transmission system, optical transmission line and optical transmitterExpiredSep 25, 00Jul 27, 04[H04J]
6748178 Optical transmission lineExpiredFeb 26, 01Jun 08, 04[H04B]
6744989 Optical transmission system, its method, and optical amplification transmission lineExpiredMay 02, 01Jun 01, 04[H04B]
6744990 WDM optical transmission system and an optical transmission line thereofExpiredNov 05, 99Jun 01, 04[H04B]
6741810 Signal demultiplexing device and signal routing device in high speed transmission systemExpiredFeb 15, 01May 25, 04[H04J]
6728437 Pumping light generator and fiber Raman amplifierExpiredJun 15, 01Apr 27, 04[G02B]
2003/0228,156 Optical signal generator and method thereofAbandonedJun 05, 03Dec 11, 03[H04B]
2003/0202,805 Optical receiving apparatus and methodAbandonedJun 12, 03Oct 30, 03[H04B]
6640026 Optical multiplexer and demultiplexerExpiredSep 18, 01Oct 28, 03[G02B]
6594003 Measuring system of transmission characteristicsExpiredApr 20, 00Jul 15, 03[G01N]
6594428 Dispersion compensating optical transmission line and systemExpiredMar 08, 00Jul 15, 03[G02B]
6556325 Optical repeater monitoring system and a method thereofExpiredFeb 18, 00Apr 29, 03[H04B]
6519078 Raman amplifierExpiredJun 21, 01Feb 11, 03[H01S]
6515793 Optical waveform shaperExpiredDec 26, 00Feb 04, 03[G02F]

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