LexDanaLexDanabeta
Inventor

George Ishikawa

Inventor
Kawasaki, JP

Overview

75→
Patents
1993–2015
Patent span
Electricity
Primary field (CPC H)

Patents· 75 as inventor

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

H04Bprimary
H04BTransmission41%
H04JMultiplex communication22%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein11%
G02BOptical elements, systems or apparatus9%
H04LTransmission of digital information, e.g. telegraphic communication7%
H04QSelecting7%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light1%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light1%
G01MTesting static or dynamic balance of machines or structures1%
PatentTitleYear
9,019,593'Optical amplification apparatus'20158,965,219'Repeater, relay method and optical transmission system'20158,705,168'Signal light monitoring apparatus, optical amplification apparatus and optical reception apparatus, and signal light monitoring method'20148,571,058'Terminal apparatus, data transmission system and data transmission method'20138,463,135'Relay apparatus, signal processing apparatus and optical communication system'20138,320,772'Optical transmission apparatus'20128,265,485'Optical transmission system and method for chromatic dispersion compensation'20128,213,798'Optical transmission apparatus, wavelength division multiplexing optical communication system and optical transmission method'20128,203,781'Signal light monitoring apparatus, optical amplification apparatus and optical reception apparatus, and signal light monitoring method'20128,086,109'Polarization multiplexed optical transmitting and receiving apparatus'20117,936,993'Chromatic dispersion compensating apparatus'20117,925,171'Optical transmission apparatus'20117,885,545'Dispersion compensation method and compensation node'20117,860,408'Interferometer for demodulating differential M-phase shift keying signal'20107,853,152'Signal regeneration device, optical receiver, and signal processing method'20107,751,706'Chromatic dispersion compensating apparatus'20107,616,900'Optical signal degradation compensator'20097,616,893'Wavelength division multiplexing optical repeating transmission method and repeating apparatus'20097,613,366'Polarization mode dispersion compensator and polarization mode dispersion compensating method'20097,613,397'Wavelength division multiplexing optical transmission system and wavelength dispersion compensation unit'20097,583,895'Polarization scrambler, optical add/drop multiplexer, optical route switching apparatus and wavelength division multiplexing optical transmission system'20097,480,459'Wavelength division multiplexing transmission system'20097,466,920'Chromatic dispersion compensating apparatus'20087,433,599'Automatic dispersion compensation device and compensation method'20087,389,049'Chromatic dispersion compensation controlling system'20087,321,736'Optical receiving station, optical communication system, and dispersion controlling method'20087,218,856'System for compensating for chromatic dispersion and polarization mode dispersion'20077,035,548'Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method'20067,030,973'Polarization mode dispersion compensator based on degree of polarization'20067,006,770'Optical receiving station, optical communication system, and dispersion controlling method'20066,930,824'Optical amplifier which compensates for dispersion of a WDM optical signal'20056,925,262'Method and system for compensating chromatic dispersion'20056,909,851'Dispersion compensation apparatus including a fixed dispersion compensator for coarse compensation and a variable dispersion compensator for fine compensation'20056,865,305'Adaptively controllable polarization mode dispersion compensator'20056,829,440'Method and apparatus for compensation of polarization-mode dispersion'20046,809,849'Control apparatus and control method for an optical method'20046,728,491'Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method'20046,661,974'Optical transmitter and optical transmission system'20036,606,424'Apparatus and method for optical modulation and demodulation'20036,573,985'Wavelength dispersion measuring device and a method thereof'20036,501,580'Method and apparatus for optimizing dispersion in an optical fiber transmission line in accordance with an optical signal power level'20026,456,411'Method of setting signal wavelength in optical transmission system'20026,417,945'Optical wavelength multiplex transmission method and optical dispersion compensation method'20026,411,416'Method and apparatus for minimizing the intensity of a specific frequency component of an optical signal travelling through an optical fiber transmission line to thereby minimize the total dispersion'20026,384,943'Optical wavelength multiplex transmission method and optical dispersion compensation method'20026,362,913'Optical modulation apparatus and method of controlling optical modulator'20026,320,687'Dispersion compensation apparatus including a fixed dispersion compensator for coarse compensation and a variable dispersion compensator for fine compensation'20016,278,539'Optical modulation apparatus and method of controlling'20016,275,314'Optical wavelength multiplex transmission method and optical dispersion compensation method'20016,262,828'Method and apparatus of driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line'20016,252,687'Optical wavelength multiplex transmission method and optical dispersion compensation method'20016,252,688'Optical wavelength multiplex transmission method and optical dispersion compensation method'20016,243,176'Optical wavelength multiplex transmission method and optical dispersion compensation method'20016,204,949'Method and device for extracting a timing signal'20016,118,564'Optical time division demultiplexing apparatus and demultiplexed signal switching method as well as optical time division multiplex transmission system'20006,081,360'Method and apparatus for optimizing dispersion in an optical fiber transmission line in accordance with an optical signal power level'20005,991,477'Optical transmission system, optical multiplexing transmission system, and related peripheral techniques'19995,982,530'Apparatus for driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line'19995,973,816'Method and apparatus of driving an optical modulator to measure, and compensation for dispersion in an optical transmission line'19995,926,297'Optical modulating device and optical modulating method'19995,917,628'Optical time-division multiplexer capable of supplying stable output signal'19995,917,637'Method of and device for driving optical modulator, and optical communications system'19995,909,297'Drift compensating circuit for optical modulators in an optical system'19995,896,217'Optical transmission system, optical multiplexing transmission system, and related peripheral techniques'19995,870,213'Optical transmission system, optical multiplexing transmission system, and related peripheral techniques'19995,815,294'Optical transmission system with transmission characteristic measuring device'19985,805,321'Control unit for optical modulators producing multiplexed optical output signal'19985,760,937'Optical demultiplexer'19985,754,322'Optical transmission system, optical multiplexing transmission system, and related peripheral techniques'19985,717,510'Optimized optical transmission system for high capacity transmission'19985,696,614'Optical wavelength multiplex transmission method and optical dispersion compensation method'19975,636,046'Optical dispersion compensation method using transmissible band determined from synergetic effect of self phase modulation and group velocity dispersion'19975,612,807'Optical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical system'19975,602,666'Optical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical system'19975,253,097'Demodulator and a polarization diversity receiver for coherent optical communication provided with the demodulator'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993–2015Patents assigned to FUJITSU LTD (75)· patent assignee history
1993–2005Based in Yokohama, JP· patent location history
1997–2015Based in Kawasaki, JP· patent location history
2001–2003Based in Kanagawa, JP· patent location history
2002Based in Nakahara, JP· patent location history
2011–2015Patents assigned to ISHIKAWA GEORGE (10)· patent assignee history
2011–2014Patents assigned to NAKAMURA KENTARO (3)· patent assignee history
2013–2015Patents assigned to KINOSHITA SUSUMU (4)· patent assignee history
2013–2015Patents assigned to SONE KYOSUKE (4)· patent assignee history
2015Based in Ota, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FUJITSU LTD751993–2015
ISHIKAWA GEORGEself102011–2015
KINOSHITA SUSUMU42013–2015
SONE KYOSUKE42013–2015
NAKAMURA KENTARO32011–2014
Locations
LocationPatentsSpan
Kawasaki, JP661997–2015
Yokohama, JP51993–2005
Kanagawa, JP22001–2003
Ota, JP12015
Nakahara, JP12002