Inventor
TAKESHITA HITOSHI
JP47 patents
⚠️ This page may combine multiple inventors who share the name “TAKESHITA HITOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
42 patentsUS6657952B1Dec 2, 2003
Ring network for sharing protection resource by working communication paths
NEC CORP109 citations97
US6404525B1Jun 11, 2002
Optical add-drop multiplexer
NEC CORP73 citations96
US6407834B1Jun 18, 2002
Optical wave network system and method of monitoring a network trouble
NEC CORP22 citations93
US6061156AMay 9, 2000
Optical transmission system
NEC CORP33 citations93
US7280470B2Oct 9, 2007
Ring network for sharing protection resource by working communication paths
NEC CORP23 citations92
US6538779B1Mar 25, 2003
Optical signal monitoring method and apparatus
NEC CORP30 citations92
US6771907B1Aug 3, 2004
Optical ring system
NEC CORP24 citations89
US11109123B2Aug 31, 2021
Optical network management apparatus and method of allocating optical frequency band
NEC CORP3 citations84
US10750259B2Aug 18, 2020
Optical network management apparatus and method of allocating optical frequency band
NEC CORP4 citations84
US10375460B2Aug 6, 2019
Optical network management apparatus and method of allocating optical frequency band
NEC CORP8 citations84
US7340187B2Mar 4, 2008
Optical signal monitoring method and apparatus
NEC CORP16 citations84
US11736839B2Aug 22, 2023
Optical network management apparatus and method of allocating optical frequency band
NEC CORP1 citations73
US11652546B2May 16, 2023
Optical network system, optical node device, and optical network control method
NEC CORP1 citations73
US11201668B2Dec 14, 2021
Optical network system, optical node device, and optical network control method
NEC CORP3 citations73
US11115318B2Sep 7, 2021
Optical network control devices and optical path setting method
NEC CORP2 citations73
US10715249B2Jul 14, 2020
Optical network system, optical node device, and optical network control method
NEC CORP3 citations73
US10211923B2Feb 19, 2019
Optical network system, optical node device, and optical path setting method
NEC CORP2 citations73
US10193651B2Jan 29, 2019
Optical network controller and optical network control method
NEC CORP2 citations73
US9979468B2May 22, 2018
Optical communication system, optical node device, and optical path setting method
NEC CORP4 citations73
US9609401B2Mar 28, 2017
Optical switch, optical transmission device, and optical switching method
NEC CORP2 citations73
US6895183B2May 17, 2005
Optical add-drop multiplexer
NEC CORP9 citations73
US7280756B2Oct 9, 2007
Optical signal transmission system, optical signal transmitter, optical signal receiver, method of transmitting optical signal and method of receiving optical signal
NEC CORP3 citations63
US12555971B2Feb 17, 2026
Light amplification device, light transmission system, and light amplification method
NEC CORP0 citations62
US12289568B2Apr 29, 2025
Optical network management apparatus and method of allocating optical frequency band
NEC CORP0 citations62
US12170539B2Dec 17, 2024
Optical network system, optical node device, and optical network control method
NEC CORP0 citations62
US12095507B2Sep 17, 2024
Multi-layer network system and path setting method in multi-layer network
NEC CORP0 citations62
US11881675B2Jan 23, 2024
Optical amplification device, optical transmission system, and optical amplification method
NEC CORP0 citations62
US11115117B2Sep 7, 2021
Submarine optical communication control device, control method, and non-transitory computer-readable medium
NEC CORP0 citations62
US10542335B2Jan 21, 2020
Optical network controller and method of setting optical path
NEC CORP1 citations62
US10230487B2Mar 12, 2019
Optical transmitter, optical communication device, optical communication system, and optical transmission method
NEC CORP1 citations62
US12375201B2Jul 29, 2025
Optical amplifier, optical amplifier controlling method, and optical transmission system
NEC CORP0 citations52
US12374851B2Jul 29, 2025
Optical amplification apparatus and optical amplification method
NEC CORP0 citations52
US12027813B2Jul 2, 2024
Optical amplifier and optical amplification method
NEC CORP0 citations52
US10938499B2Mar 2, 2021
Optical path controller and method of controlling optical path
NEC CORP0 citations52
US10848245B2Nov 24, 2020
Multi-layer network system and path setting method in multi-layer network
NEC CORP0 citations52
US10447419B2Oct 15, 2019
Optical node device, optical network controller, and optical network control method
NEC CORP0 citations52
US11212027B2Dec 28, 2021
Optical path setting device, optical communication system, and optical path setting method
NEC CORP0 citations51
US10848262B2Nov 24, 2020
Optical path design apparatus and optical path design method
NEC CORP0 citations42
US10382135B2Aug 13, 2019
Optical node device, optical network controller, and optical network control method
NEC CORP0 citations42
US10231035B2Mar 12, 2019
Optical network controller and optical network control method
NEC CORP0 citations42
US9590725B2Mar 7, 2017
Multi-failure resolution optical node, optical communication system using same, and wavelength path switching method
NEC CORP0 citations42
US12457036B2Oct 28, 2025
Transmission direction determination apparatus, transmission direction determination method, recording medium, and transmission direction determination module
NEC CORP0 citations41
TAKESHITA HITOSHI
2 patentsSHIOIRI SATOMI
2 patentsUS8165477B2Apr 24, 2012
Light receiving apparatus using DQPSK demodulation method, and DQPSK demodulation method
SHIOIRI SATOMI2 citations60
US8639114B2Jan 28, 2014
DPSK modulation-demodulation method, and optical communication device and optical communication system using the same
SHIOIRI SATOMI0 citations34