LexDanaLexDanabeta
Inventor

Nobuhiro Fukushima

Inventor
Kawasaki, JP

Overview

59→
Patents
1990–2014
Patent span
Physics
Primary field (CPC G)

Patents· 59 as inventor

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

G02Bprimary
G02BOptical elements, systems or apparatus39%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein32%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light8%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light5%
H04BTransmission5%
Y10TTechnical subjects covered by former us classification2%
A23LFoods, foodstuffs or non-alcoholic beverages, not otherwise provided for1%
A61KPreparations for medical, dental or toiletry purposes1%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations1%
G11BInformation storage based on relative movement between record carrier and transducer1%
PatentTitleYear
8,711,359'Delay interferometer using magneto-optic effect of a variable faraday rotator'20148,331,744'Optical switch'20127,792,436'Optical receiver corresponding to differential M-phase shift keying system'20107,535,616'Polarization controlling apparatus and polarization operation apparatus'20097,340,128'Wavelength selection device'20087,330,617'Wavelength selective optical switch, and optical device provided with spectroscopic function'20087,171,084'Optical apparatus provided with demultiplexing function'20077,050,216'Variable optical filter'20066,999,655'Optical communication system and optical communication method having confidentiality'20066,753,997'Magnetic field generator for optical devices utilizing magneto-optical effect'20046,717,713'Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal'20046,717,730'Tunable optical filter'20046,666,944'Method of manufacturing optical filter'20036,570,699'Variable optical attenuator which applies a magnetic field to a Faraday element to rotate the polarization of a light signal'20036,507,422'Optical attenuator and system, optical amplifier, and terminal device each having the optical attenuator'20036,493,129'Tunable optical filter'20026,407,836'Optical attenuator and system, optical amplifier, and terminal device each having the optical attenuator'20026,392,784'Faraday rotator'20026,384,957'Variable optical attenuator utilizing Faraday effect'20026,339,492'Tunable optical filter'20026,334,924'Method of manufacturing optical filter'20026,333,806'Variable optical attenuator which applies a magnetic field to a Faraday element to rotate the polarization of a light signal'20016,299,911'Extract of Touchi containing an .alpha.-glucosidase inhibitor'20016,288,827'Faraday rotator'20016,275,323'Optical attenuator'20016,246,818'Tunable optical filter'20016,048,102'Optical connector which provides a disconnection state between two optical fibers where light is totally reflected at an end face of one fiber'20006,018,412'Optical attenuator'20006,018,411'Optical device utilizing magneto-optical effect'20005,999,313'Optical device having function of optical circulator'19995,999,305'Optical device which makes use of magneto-optical effect'19995,973,821'Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of light signal'19995,905,827'Optical multiplexer/demultiplexer and wavelength division multiplexing module'19995,896,201'Optical device for wavelength monitoring and wavelength control'19995,889,609'Optical attenuator'19995,867,300'Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal'19995,844,710'Faraday rotator and optical device employing the same'19985,822,124'Beam splitter'19985,812,304'Faraday rotator which generates a uniform magnetic field in a magnetic optical element'19985,812,707'Polarizer housing device for connecting a polarizer to an optical waveguide'19985,805,759'Optical equalizer having variable transmittance versus wavelength characteristics for attenuating light'19985,801,892'Optical device having an optical film with an incident angle thereupon variable'19985,798,865'Beam splitter'19985,781,347'Optical device'19985,771,118'Beam splitter'19985,745,283'Method and apparatus for controlling optical amplifier used for optically amplifying wavelength-division multiplexed signal'19985,745,290'Beam splitter'19985,731,871'Light quantity measuring device that can accurately measure quantity regardless of polarization of measured light'19985,699,187'Optical coupler'19975,696,859'Optical-filter array, optical transmitter and optical transmission system'19975,692,082'Laser diode module and depolarizer'19975,661,602'Beam splitter'19975,646,399'Tunable optical filter having beam splitter and movable film filter'19975,625,494'Optical band-pass filter having two pass bands'19975,579,420'Optical filter'19965,537,244'Light amplifier'19965,402,509'Optical fiber coupling device including lenses and magnetooptics'19955,291,571'Duplicated light source module'19944,955,006'Floating type magneto-optic disk reading head system having external semiconductor laser resonator operating at orthogonal two mode oscillations'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–2012Patents assigned to FUJITSU LTD (56)· patent assignee history
1990–2014Based in Kawasaki, JP· patent location history
2001–2006Patents assigned to FDK CORP (2)· patent assignee history
2001–2006Based in Kanagawa, JP· patent location history
2001Based in Ibaraki, JP· patent location history
2012–2014Patents assigned to FUKUSHIMA NOBUHIRO (2)· patent assignee history
2012Patents assigned to FURUKAWA HIROYUKI (1)· patent assignee history
2014Patents assigned to FUJITSU OPTICAL COMPONENTS LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FUJITSU LTD561990–2012
FDK CORP22001–2006
FUKUSHIMA NOBUHIROself22012–2014
FUJITSU OPTICAL COMPONENTS LTD12014
FURUKAWA HIROYUKI12012
Locations
LocationPatentsSpan
Kawasaki, JP551990–2014
Kanagawa, JP32001–2006
Ibaraki, JP12001