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Inventor

Akio Yoshikawa

Inventor
Kyoto, JP

Overview

39→
Patents
1978–2020
Patent span
Electricity
Primary field (CPC H)

Patents· 39 as inventor

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

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer20%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light20%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1012%
G06FElectric digital data processing9%
H04NPictorial communication, e.g. television9%
G02BOptical elements, systems or apparatus7%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
G09GArrangements or circuits for control of indicating devices using static means to present variable information3%
H04BTransmission3%
H10HInorganic light-emitting semiconductor devices having potential barriers3%
PatentTitleYear
10,778,898Imaging control apparatus for controlling to display focus information and control method for controlling imaging control apparatus202010,750,095Display control apparatus and method for controlling the same202010,205,872Display control apparatus and method for controlling the same201910,158,800Display control device and control method therefor20189,979,881Imaging control apparatus and method for controlling the same20189,778,686'Electronic apparatus, its control method and program, and storage medium'20179,513,676'Electronic device and extension unit for electronic device'20169,489,167'Display control apparatus and control method therefor'20169,405,370'Electronic device and control method thereof'20167,064,898'Optoelectronic device'20066,947,213'Diffractive optical element that polarizes light and an optical pickup using the same'20056,822,989'Semiconductor laser and a manufacturing method for the same'20046,735,024'Optical pickup with improved optical properties'20046,728,034'Diffractive optical element that polarizes light and an optical pickup using the same'20046,728,035'Optical device with diffraction grating having plural grating regions'20046,631,148'Semiconductor laser and a manufacturing method for the same'20036,614,743'Semiconductor laser device'20036,597,642'Photodetector unit, and optical pickup, optical reproduction apparatus, and optical recording apparatus equipped with the same'20036,534,794'Semiconductor light-emitting unit, optical apparatus and optical disk system having heat sinking means and a heating element incorporated with the mounting system'20036,501,156'Lead frame which includes a die pad, a support lead, and inner leads'20026,501,601'Optical device with diffraction grating having plural grating regions'20026,473,248'Method for manufacturing an optical pickup'20026,292,500'Semiconductor laser device'20016,192,020'Semiconductor laser device'20015,793,785'Semiconductor laser device'19985,751,756'Semiconductor laser device for use as a light source of an optical disk or the like'19985,748,658'Semiconductor laser device and optical pickup head'19985,729,519'Optical head including a semiconductor laser having a non-scatter area to diffuse incident light beams'19985,617,435'Lasing system with wavelength-conversion waveguide'19975,539,767'Semiconductor laser device'19965,517,479'Optical head including a semiconductor laser having a non-scatter incident area'19965,481,524'Diffraction element and optical pick-up assembly'19965,479,426'Semiconductor laser device with integrated reflector on a (511) tilted lattice plane silicon substrate'19955,478,438'Method of etching semiconductor substrate'19955,349,463'Optical radio repeater with signal quality detection'19945,289,306'Repeater system'19944,948,753'Method of producing stripe-structure semiconductor laser'19904,719,633'Buried stripe-structure semiconductor laser'19884,122,770'Series printer'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–2006Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (16)· patent assignee history
1994Patents assigned to NTT DATA TSUSHIN KK (2)· patent assignee history
1994Patents assigned to VICTOR COMPANY OF JAPAN (2)· patent assignee history
1995–2001Patents assigned to MATSUSHITA ELECTRONICS CORP (9)· patent assignee history
1995–1998Based in Ibaraki, JP· patent location history
1997–2006Based in Kyoto, JP· patent location history
2001–2005Based in Kyotanabe, JP· patent location history
2016–2020Patents assigned to CANON KK (8)· patent assignee history
2016–2017Based in Tokyo, JP· patent location history
2018–2020Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD161988–2006
MATSUSHITA ELECTRONICS CORP91995–2001
CANON KK82016–2020
NTT DATA TSUSHIN KK21994
VICTOR COMPANY OF JAPAN21994
Locations
LocationPatentsSpan
Kyoto, JP91997–2006
Kyotanabe, JP82001–2005
Ibaraki, JP71995–1998
Yokohama, JP52018–2020
Tokyo, JP32016–2017