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Inventor

Masahito Tomizawa

Inventor
Yokosuka, JP

Overview

36→
Patents
1996–2020
Patent span
Electricity
Primary field (CPC H)

Patents· 36 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Bprimary
H04BTransmission32%
H04JMultiplex communication28%
H04LTransmission of digital information, e.g. telegraphic communication23%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein5%
H03HImpedance networks, e.g. resonant circuits3%
H03MCoding3%
H04QSelecting3%
G01MTesting static or dynamic balance of machines or structures2%
H04NPictorial communication, e.g. television2%
PatentTitleYear
10,880,193Error correction device, error correction method, and communication device202010,868,617Chromatic dispersion compensation device, chromatic dispersion compensation method, and communication device202010,608,743Transmission characteristic compensation apparatus, transmission characteristic compensation method, and communication apparatus202010,523,335Known signal detection method201910,419,127Phase compensation device, phase compensation method and communication apparatus201910,374,718Optical transmission distortion compensation device, optical transmission distortion compensation method, and communication device201910,305,675Data phase tracking device, data phase tracking method and communication device201910,171,173Optical signal transmission apparatus and optical signal transmission method201910,128,818Data processor, data processing method and communication device201810,122,462Transport apparatus and transport method201810,122,465Digital signal processing device and optical transceiver apparatus201810,038,507Optical transmission system, phase compensation method, and optical reception apparatus20189,698,932'Optical transmission/reception system, transmitter, receiver, and optical transmission/reception method'20179,667,350'Optical receiving device and phase cycle reduction method'20179,621,299'Coherent communication system, communication method, and transmission method'20179,438,365'Client signal mapping circuit and mapping method'20169,178,614'Method for estimating amount of wavelength dispersion, wavelength dispersion compensation circuit, and receiving device'20159,160,479'Client signal mapping circuit and mapping method'20158,977,120'Client signal accommodating multiplexing apparatus and method'20158,971,703'Wavelength dispersion amount estimation method, wavelength dispersion compensation circuit, and reception device'20158,571,037'Optical digital transmission system'20138,514,881'Digital transmission system and digital transmission method'20138,254,789'Device and method for adjusting chromatic dispersion'20128,135,285'Optical transmission system and method'20128,005,374'Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission system'20117,970,008'Multiplexing transmission system and multiplexing transmission method'20117,734,194'Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission system'20107,536,108'High precision chromatic dispersion measuring method and automatic dispersion compensating optical link system that uses this method'20097,424,230'Digital transmission system'20087,116,917'Optical transmitter and optical transmission system'20067,095,758'Multiplexing and transmission apparatus'20067,002,968'Transport system and transport method'20066,598,092'Trunk transmission network'20036,202,082'Trunk transmission network'20016,034,974'Channel-selection-type demultiplexing circuit'20005,574,717'Line terminating equipment in SDH networks, using forward error correcting codes'1996

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1996–2020Patents assigned to NIPPON TELEGRAPH & TELEPHONE (35)· patent assignee history
1996–2019Based in Yokosuka, JP· patent location history
2000–2013Based in Yokohama, JP· patent location history
2012–2020Patents assigned to NTT ELECTRONICS CORP (12)· patent assignee history
2012–2015Patents assigned to TOMIZAWA MASAHITO (8)· patent assignee history
2012–2015Patents assigned to AISAWA SHIGEKI (5)· patent assignee history
2012–2013Patents assigned to MIYAMOTO YUTAKA (4)· patent assignee history
2015–2017Based in Musashino, JP· patent location history
2016–2020Based in Kanagawa, JP· patent location history
2019Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NIPPON TELEGRAPH & TELEPHONE351996–2020
NTT ELECTRONICS CORP122012–2020
TOMIZAWA MASAHITOself82012–2015
AISAWA SHIGEKI52012–2015
MIYAMOTO YUTAKA42012–2013
Locations
LocationPatentsSpan
Yokosuka, JP201996–2019
Kanagawa, JP92016–2020
Yokohama, JP42000–2013
Musashino, JP22015–2017
Tokyo, JP12019