Inventor · disambiguated record
Koji Takeguchi
Also filed as: TAKEGUCHI KOJI
26 granted patents·6 pending applications·161 citations·filing 1999–2016
95Inventor score
Files withFUJITSU LTD20FUJITSU NETWORK COMMUNICATIONS2OCLARO JAPAN INC2SHIRAI KATSUHIRO2TAKEGUCHI KOJI2
Top patents by PatentIndex Score
32 records- 0188US7184663B2Optical ring network with hub node and methodFUJITSU LTD·Filed 2002·Granted Feb 27, 2007·27 cites·5 claims
- 0285US6842562B2Optical add/drop node and methodFUJITSU NETWORK COMMUNICATIONS·Filed 2002·Granted Jan 11, 2005·22 cites·25 claims
- 0383US7231148B2Flexible open ring optical network and methodFUJITSU LTD·Filed 2002·Granted Jun 12, 2007·16 cites·28 claims
- 0477US9703053B2Optical transceiverOCLARO JAPAN INC·Filed 2015·Granted Jul 11, 2017·3 cites·11 claims
- 0574US7283740B2Optical ring network with optical subnets and methodFUJITSU LTD·Filed 2002·Granted Oct 16, 2007·12 cites·23 claims
- 0673US7024121B2Optical clock signal distribution system in WDM networkFUJITSU LTD·Filed 2002·Granted Apr 4, 2006·12 cites·9 claims
- 0766US7970278B2Flexible open ring optical network and methodFUJITSU LTD·Filed 2007·Granted Jun 28, 2011·2 cites·11 claims
- 0863US8965197B2Method of switching optical transport network and node deviceSHIRAI KATSUHIRO·Filed 2012·Granted Feb 24, 2015·2 cites·4 claims
- 0961US7200332B2System and method for assigning traffic to wavelengths in optical networksFUJITSU LTD·Filed 2002·Granted Apr 3, 2007·5 cites·12 claims
- 1060US7283739B2Multiple subnets in an optical ring network and methodFUJITSU LTD·Filed 2002·Granted Oct 16, 2007·4 cites·34 claims
- 1159US9515848B2Transmission device, transmission system, and transmission methodFUJITSU LTD·Filed 2014·Granted Dec 6, 2016·1 cites·14 claims
- 1259US7076163B2Method and system for testing during operation of an open ring optical networkFUJITSU LTD·Filed 2002·Granted Jul 11, 2006·4 cites·34 claims
- 1359US6567422B1Network synchronization controller and timing loop prevention methodFUJITSU LTD·Filed 1999·Granted May 20, 2003·27 cites·20 claims
- 1457US7266294B2Coupler-based optical cross-connectFUJITSU LTD·Filed 2003·Granted Sep 4, 2007·3 cites·26 claims
- 1554US7548693B2Relay transmission apparatusFUJITSU LTD·Filed 2004·Granted Jun 16, 2009·3 cites·10 claims
- 1653US9264167B2Optical add drop multiplexerTAKATSU KAZUO·Filed 2011·Granted Feb 16, 2016·1 cites·14 claims
- 1750US9197347B2Optical transmission system and noise suppression methodNAKASHIMA MINESHI·Filed 2012·Granted Nov 24, 2015·1 cites·6 claims
- 1850US7957644B2Flexible open ring optical network and methodFUJITSU LTD·Filed 2007·Granted Jun 7, 2011·0 cites·7 claims
- 1949US7116905B2Method and system for control signaling in an open ring optical networkFUJITSU LTD·Filed 2002·Granted Oct 3, 2006·1 cites·25 claims
- 2049US6735171B2SDH transmission system, SDH transmission equipment and line switching control method in SDH transmission systemFUJITSU LTD·Filed 1999·Granted May 11, 2004·14 cites·29 claims
- 2148US7239649B2Transmission systemFUJITSU LTD·Filed 2001·Granted Jul 3, 2007·1 cites·4 claims
- 2246US7957429B2Transmission systemFUJITSU LTD·Filed 2007·Granted Jun 7, 2011·0 cites·5 claims
- 2345US9154373B2Failure protection method and node apparatusFUJITSU LTD·Filed 2013·Granted Oct 6, 2015·0 cites·18 claims
- 2445US8681785B2Communication apparatus and path setting control methodSHIRAI KATSUHIRO·Filed 2009·Granted Mar 25, 2014·0 cites·6 claims
- 2544US2005175346A1Upgraded flexible open ring optical network and methodFUJITSU LTD·Filed 2004·Application pending·0 cites
- 2644US2005019034A1System and method for communicating optical traffic between ring networksFUJITSU NETWORK COMMUNICATIONS·Filed 2003·Application pending·0 cites
- 2743US8320278B2Communication device, system and method to form communication routeTAKEGUCHI KOJI·Filed 2009·Granted Nov 27, 2012·0 cites·20 claims
- 2842US2004052530A1Optical network with distributed sub-band rejectionsFiled 2002·Application pending·0 cites
- 2936US2010247095A1Wavelength division multiplexing apparatus and dispersion compensating method for optical signalFUJITSU LTD·Filed 2010·Application pending·0 cites
- 3036US2002012318A1Network managing method, network node apparatus, and mesh-type networkFiled 2001·Application pending·0 cites
- 3135US8977130B2Optical transmission device and optical filter circuitTAKEGUCHI KOJI·Filed 2011·Granted Mar 10, 2015·0 cites·17 claims
- 3235US2017168249A1Optical module and optical transmission deviceOCLARO JAPAN INC·Filed 2016·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →