LexDanaLexDanabeta
Inventor

Terumi Chikama

Inventor
Kawasaki, JP

Overview

49→
Patents
1990–2014
Patent span
Electricity
Primary field (CPC H)

Patents· 49 as inventor

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

H04Bprimary
H04BTransmission41%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light24%
H04JMultiplex communication24%
H04QSelecting4%
H04LTransmission of digital information, e.g. telegraphic communication2%
H04MTelephonic communication2%
G02BOptical elements, systems or apparatus1%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein1%
H03DDemodulation or transference of modulation from one carrier to another1%
PatentTitleYear
8,699,126'Multi-wavelength light amplifier'20148,320,040'Multi-wavelength light amplifier'20128,004,752'Multi-wavelength light amplifier'20117,474,459'Multi-wavelength light amplifier'20097,224,517'Multi-wavelength light amplifier'20077,142,785'Light branching/inserting apparatus and light branching apparatus using wavelength selection filter'20067,088,922'Wavelength division multiplexing optical communication system'20066,891,662'Optical amplifier and method for amplifying wavelength multiplexed transmission signal light'20056,873,457'Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control method'20056,807,376'Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier'20046,738,181'Optical sending apparatus and channel extension method'20046,661,974'Optical transmitter and optical transmission system'20036,647,211'REMOTE CONTROL DEVICE OF ACOUSTO-OPTIC TUNABLE FILTER AND OPTICAL TRANSMISSION SYSTEM CONTAINING EQUALIZER USING ACOUSTO-OPTIC TUNABLE FILTER AND OPTICAL TRANSMISSION SYSTEM CONTAINING OPTICAL ADD/DROP MULTIPLEXER USING ACOUSTO-OPTIC TUNABLE FILTER'20036,631,026'Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control method'20036,583,900'Optical transmission apparatus, optical transmission system, and optical terminal station'20036,545,784'Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit'20036,542,291'Optical amplifier excitation light source control method for use in optical amplifier and optical amplifier control method'20036,538,782'Light branching/inserting apparatus and light branching apparatus using wavelength selection filter'20036,507,431'Remotely pumping type multi-wavelength light transmission system'20036,496,300'Optical amplifier'20026,480,329'Multi-wavelength light amplifier'20026,411,411'Optical wavelength selective control apparatus'20026,400,499'Multi-wavelength light amplifier'20026,373,623'Optical amplifier for use in optical communications equipment'20026,369,938'Multi-wavelength light amplifier'20026,366,379'REMOTE CONTROL DEVICE OF ACOUSTO-OPTIC TUNABLE FILTER AND OPTICAL TRANSMISSION SYSTEM CONTAINING EQUALIZER USING ACOUSTO-OPTIC TUNABLE FILTER AND OPTICAL TRANSMISSION SYSTEM CONTAINING OPTICAL ADD/DROP MULTIPLEXER USING ACOUSTO-OPTIC TUNABLE FILTER'20026,366,376'Optical transmitting device using wavelength division multiplexing to transmit signal lights having frequencies arranged to eliminate effects of four-wave mixing (FWM)'20026,351,323'Optical transmission apparatus, optical transmission system, and optical terminal station'20026,344,914'Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier'20026,335,823'Optical amplifier for use in optical communications equipment'20026,292,289'Method, device, and system for transmitting a supervisory optical signal'20016,285,479'Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit'20016,278,536'Optical transmission device for bi-directional optical communication'20016,178,037'Optical amplifying apparatus'20016,055,092'Multi-wavelength light amplifier'20005,903,385'Remotely pumping type multi-wavelength light transmission system'19995,875,054'Bidirectional optical amplifier circuit'19995,737,118'Optical amplifying apparatus'19985,729,372'Optical transmission method and apparatus and optical amplification method and apparatus for optical communication system'19985,701,195'Light signal reception apparatus having an improved light surge eliminating function'19975,568,305'Heterodyne receiver provided with a frequency discriminator for coherent lightwave communications'19965,539,566'Optical transmission method and apparatus and optical amplification method and apparatus for optical communication system'19965,253,097'Demodulator and a polarization diversity receiver for coherent optical communication provided with the demodulator'19935,228,043'Direct modulation phase shift keying (DM-PSK) transmission system'19935,115,332'Receiver for coherent optical communication'19925,052,051'Heterodyne receiver for coherent optical communication'19915,050,176'Direct modulation phase-shift-keying system and method'19915,003,626'Dual balanced optical signal receiver'19914,965,858'Polarization diversity optical receiver for coherent optical communication'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–2014Patents assigned to FUJITSU LTD (49)· patent assignee history
1990–2014Based in Kawasaki, JP· patent location history
1991–1992Based in Machida, JP· patent location history
1993Based in Tokyo, JP· patent location history
2002Based in Kanagawa, JP· patent location history
2005Based in Zama, JP· patent location history
2012Patents assigned to CHIKAMA TERUMI (1)· patent assignee history
2012Patents assigned to KINOSHITA SUSUMU (1)· patent assignee history
2012Patents assigned to SUGAYA YASUSHI (1)· patent assignee history
2012Patents assigned to TAKEDA MIKI (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FUJITSU LTD491990–2014
CHIKAMA TERUMIself12012
KINOSHITA SUSUMU12012
SUGAYA YASUSHI12012
TAKEDA MIKI12012
Locations
LocationPatentsSpan
Kawasaki, JP421990–2014
Machida, JP31991–1992
Tokyo, JP21993
Zama, JP12005
Kanagawa, JP12002