Inventor
TAKEGUCHI KOJI
JP26 patents
⚠️ This page may combine multiple inventors who share the name “TAKEGUCHI KOJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
18 patentsUS7231148B2Jun 12, 2007
Flexible open ring optical network and method
FUJITSU LTD16 citations92
US7184663B2Feb 27, 2007
Optical ring network with hub node and method
FUJITSU LTD27 citations92
US6567422B1May 20, 2003
Network synchronization controller and timing loop prevention method
FUJITSU LTD27 citations89
US7283740B2Oct 16, 2007
Optical ring network with optical subnets and method
FUJITSU LTD12 citations84
US6735171B2May 11, 2004
SDH transmission system, SDH transmission equipment and line switching control method in SDH transmission system
FUJITSU LTD14 citations84
US7024121B2Apr 4, 2006
Optical clock signal distribution system in WDM network
FUJITSU LTD12 citations83
US7266294B2Sep 4, 2007
Coupler-based optical cross-connect
FUJITSU LTD3 citations63
US7970278B2Jun 28, 2011
Flexible open ring optical network and method
FUJITSU LTD2 citations62
US7283739B2Oct 16, 2007
Multiple subnets in an optical ring network and method
FUJITSU LTD4 citations62
US7200332B2Apr 3, 2007
System and method for assigning traffic to wavelengths in optical networks
FUJITSU LTD5 citations62
US7076163B2Jul 11, 2006
Method and system for testing during operation of an open ring optical network
FUJITSU LTD4 citations62
US7548693B2Jun 16, 2009
Relay transmission apparatus
FUJITSU LTD3 citations60
US7957644B2Jun 7, 2011
Flexible open ring optical network and method
FUJITSU LTD0 citations51
US7957429B2Jun 7, 2011
Transmission system
FUJITSU LTD0 citations51
US7239649B2Jul 3, 2007
Transmission system
FUJITSU LTD1 citations51
US7116905B2Oct 3, 2006
Method and system for control signaling in an open ring optical network
FUJITSU LTD1 citations51
US9515848B2Dec 6, 2016
Transmission device, transmission system, and transmission method
FUJITSU LTD1 citations48
US9154373B2Oct 6, 2015
Failure protection method and node apparatus
FUJITSU LTD0 citations48