Inventor
TOMIZAWA MASAHITO
JP45 patents
⚠️ This page may combine multiple inventors who share the name “TOMIZAWA MASAHITO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
25 patentsUS6202082B1Mar 13, 2001
Trunk transmission network
NIPPON TELEGRAPH & TELEPHONE110 citations97
US7536108B2May 19, 2009
High precision chromatic dispersion measuring method and automatic dispersion compensating optical link system that uses this method
NIPPON TELEGRAPH & TELEPHONE30 citations92
US7116917B2Oct 3, 2006
Optical transmitter and optical transmission system
NIPPON TELEGRAPH & TELEPHONE32 citations92
US6598092B2Jul 22, 2003
Trunk transmission network
NIPPON TELEGRAPH & TELEPHONE28 citations92
US7002968B1Feb 21, 2006
Transport system and transport method
NIPPON TELEGRAPH & TELEPHONE26 citations91
US5574717ANov 12, 1996
Line terminating equipment in SDH networks, using forward error correcting codes
NIPPON TELEGRAPH & TELEPHONE51 citations90
US9621299B2Apr 11, 2017
Coherent communication system, communication method, and transmission method
NIPPON TELEGRAPH & TELEPHONE15 citations84
US8005374B2Aug 23, 2011
Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission system
NIPPON TELEGRAPH & TELEPHONE10 citations83
US7734194B2Jun 8, 2010
Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission system
NIPPON TELEGRAPH & TELEPHONE16 citations83
US10171173B2Jan 1, 2019
Optical signal transmission apparatus and optical signal transmission method
NIPPON TELEGRAPH & TELEPHONE2 citations73
US10038507B2Jul 31, 2018
Optical transmission system, phase compensation method, and optical reception apparatus
NIPPON TELEGRAPH & TELEPHONE3 citations72
US7424230B2Sep 9, 2008
Digital transmission system
NIPPON TELEGRAPH & TELEPHONE2 citations63
US7095758B2Aug 22, 2006
Multiplexing and transmission apparatus
NIPPON TELEGRAPH & TELEPHONE3 citations63
US11683093B2Jun 20, 2023
Wavelength dispersion compensation apparatus, optical receiving apparatus, wavelength dispersion compensation method and computer program
NIPPON TELEGRAPH & TELEPHONE1 citations62
US7970008B2Jun 28, 2011
Multiplexing transmission system and multiplexing transmission method
NIPPON TELEGRAPH & TELEPHONE4 citations62
US6034974AMar 7, 2000
Channel-selection-type demultiplexing circuit
NIPPON TELEGRAPH & TELEPHONE5 citations62
US11671119B2Jun 6, 2023
Signal processing apparatus and signal processing method
NIPPON TELEGRAPH & TELEPHONE0 citations52
US9698932B2Jul 4, 2017
Optical transmission/reception system, transmitter, receiver, and optical transmission/reception method
NIPPON TELEGRAPH & TELEPHONE1 citations52
US9438365B2Sep 6, 2016
Client signal mapping circuit and mapping method
NIPPON TELEGRAPH & TELEPHONE0 citations52
US12170607B2Dec 17, 2024
Transmission apparatus, transmission system and delay adjustment method
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11923862B2Mar 5, 2024
Transmission apparatus and transmission system
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11916685B2Feb 27, 2024
Transmission apparatus and transmission method
NIPPON TELEGRAPH & TELEPHONE0 citations51
US12119867B2Oct 15, 2024
Transmission apparatus and transmission method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US10122462B2Nov 6, 2018
Transport apparatus and transport method
NIPPON TELEGRAPH & TELEPHONE0 citations41
US9667350B2May 30, 2017
Optical receiving device and phase cycle reduction method
NIPPON TELEGRAPH & TELEPHONE0 citations41
NTT ELECTRONICS CORP
12 patentsUS10868617B2Dec 15, 2020
Chromatic dispersion compensation device, chromatic dispersion compensation method, and communication device
NTT ELECTRONICS CORP2 citations73
US10305675B2May 28, 2019
Data phase tracking device, data phase tracking method and communication device
NTT ELECTRONICS CORP2 citations72
US10608743B2Mar 31, 2020
Transmission characteristic compensation apparatus, transmission characteristic compensation method, and communication apparatus
NTT ELECTRONICS CORP4 citations71
US11323238B2May 3, 2022
Frame synchronization apparatus, optical communication apparatus, and frame synchronization method
NTT ELECTRONICS CORP0 citations62
US11201721B2Dec 14, 2021
Frame synchronization apparatus, optical communication apparatus, and frame synchronization method
NTT ELECTRONICS CORP0 citations62
US10880193B2Dec 29, 2020
Error correction device, error correction method, and communication device
NTT ELECTRONICS CORP1 citations61
US10374718B2Aug 6, 2019
Optical transmission distortion compensation device, optical transmission distortion compensation method, and communication device
NTT ELECTRONICS CORP1 citations59
US10128818B2Nov 13, 2018
Data processor, data processing method and communication device
NTT ELECTRONICS CORP0 citations51
US11329764B2May 10, 2022
Error correction device, error correction method, and optical communication system
NTT ELECTRONICS CORP0 citations48
US10419127B2Sep 17, 2019
Phase compensation device, phase compensation method and communication apparatus
NTT ELECTRONICS CORP0 citations47
US10122465B2Nov 6, 2018
Digital signal processing device and optical transceiver apparatus
NTT ELECTRONICS CORP0 citations41
US10523335B2Dec 31, 2019
Known signal detection method
NTT ELECTRONICS CORP0 citations40
KISAKA YOSHIAKI
2 patentsYAMAZAKI ETSUSHI
2 patentsUS9178614B2Nov 3, 2015
Method for estimating amount of wavelength dispersion, wavelength dispersion compensation circuit, and receiving device
YAMAZAKI ETSUSHI0 citations35
US8971703B2Mar 3, 2015
Wavelength dispersion amount estimation method, wavelength dispersion compensation circuit, and reception device
YAMAZAKI ETSUSHI0 citations35