Inventor
TOCHIO YUJI
JP38 patents
⚠️ This page may combine multiple inventors who share the name “TOCHIO YUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
28 patentsUS6429976B1Aug 6, 2002
Optical switch using tilt mirrors
FUJITSU LTD25 citations93
US6795656B1Sep 21, 2004
Optical transmission circuit using a semiconductor laser
FUJITSU LTD37 citations92
US6711314B1Mar 23, 2004
Optical switch control method and apparatus thereof
FUJITSU LTD21 citations92
US6563613B1May 13, 2003
Optical subscriber network, and delay measurement method
FUJITSU LTD49 citations92
US9075769B2Jul 7, 2015
Communication control device and communication control method
FUJITSU LTD8 citations84
US7961602B2Jun 14, 2011
Method and device using a backup communication path to transmit excess traffic
FUJITSU LTD10 citations84
US6215567B1Apr 10, 2001
Optical transmitting apparatus and optical receiving apparatus, and optical communicating method
FUJITSU LTD15 citations84
US7239773B2Jul 3, 2007
Optical-switch testing apparatus, optical-signal switching apparatus, optical-switch testing method, and control method for optical-signal switching
FUJITSU LTD7 citations74
US7158551B2Jan 2, 2007
Driver circuit and driving method for semiconductor laser
FUJITSU LTD8 citations74
US7122786B2Oct 17, 2006
Controlling apparatus and controlling method of optical switching device
FUJITSU LTD8 citations74
US6069892AMay 30, 2000
Fixed-length cell transmission system, fixed-length cell transmitting unit, and fixed-length cell receiving unit
FUJITSU LTD8 citations74
US9391694B2Jul 12, 2016
Protection path providing method and transmission device
FUJITSU LTD4 citations73
US7912329B2Mar 22, 2011
Optical-switch testing apparatus, optical-signal switching apparatus, optical-switch testing method, and control method for optical-signal switching
FUJITSU LTD1 citations63
US6968102B2Nov 22, 2005
Node device of optical ring network
FUJITSU LTD5 citations63
US6760147B2Jul 6, 2004
Control apparatus and control method of optical signal exchanger
FUJITSU LTD4 citations63
US10917350B2Feb 9, 2021
Transmission device and network system
FUJITSU LTD1 citations62
US7398019B2Jul 8, 2008
Control apparatus and control method of optical signal exchanger
FUJITSU LTD6 citations62
US11923968B2Mar 5, 2024
Optical transmission device, optical transmission system and method of updating the optical transmission device
FUJITSU LTD0 citations52
US10848840B2Nov 24, 2020
Communication apparatus and signal relay method
FUJITSU LTD0 citations52
US10742543B2Aug 11, 2020
Transmission apparatus and redundancy method
FUJITSU LTD0 citations52
US10009262B2Jun 26, 2018
Transmission apparatus and redundancy method
FUJITSU LTD1 citations52
US9264283B2Feb 16, 2016
Method of accommodating signals, frame generation apparatus, frame reception apparatus, and transmission system
FUJITSU LTD1 citations52
US7821971B2Oct 26, 2010
Protection providing method and customer edge apparatus
FUJITSU LTD1 citations52
US7596290B2Sep 29, 2009
Optical-switch testing apparatus, optical-signal switching apparatus, optical-switch testing method, and control method for optical-signal switching
FUJITSU LTD0 citations52
US7467171B2Dec 16, 2008
Digital filter device
FUJITSU LTD0 citations51
US9716650B2Jul 25, 2017
Communication system and transfer apparatus
FUJITSU LTD0 citations42
US7929451B2Apr 19, 2011
Switch and packet forwarding method
FUJITSU LTD0 citations42
US7907516B2Mar 15, 2011
Node setting apparatus, network system, node setting method, and computer product
FUJITSU LTD0 citations42
TOCHIO YUJI
9 patentsUS8873380B2Oct 28, 2014
System and method for setting redundant path segments in a multi-ring communication network
TOCHIO YUJI10 citations83
US8208469B2Jun 26, 2012
Communication system and apparatus
TOCHIO YUJI7 citations83
US8174963B2May 8, 2012
Data relay apparatus and failure recovery method
TOCHIO YUJI3 citations62
US8737201B2May 27, 2014
Data relay apparatus, and ring-type communication system
TOCHIO YUJI1 citations51
US8441923B2May 14, 2013
Communication path providing method and communication apparatus
TOCHIO YUJI1 citations51
US9369786B2Jun 14, 2016
Optical transmission device and optical transmission network system
TOCHIO YUJI0 citations41
US9154326B2Oct 6, 2015
Transmission apparatus, failure recovery method, and network system
TOCHIO YUJI0 citations41
US9048966B2Jun 2, 2015
Optical transmission apparatus
TOCHIO YUJI0 citations41
US8917592B2Dec 23, 2014
Communication apparatus, system, and method
TOCHIO YUJI0 citations41