LexDanaLexDanabeta
Inventor

Masakazu Matsumoto

Inventor
Yokohama, JP

Overview

66→
Patents
1977–2020
Patent span
Physics
Primary field (CPC G)

Patents· 66 as inventor

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

G03Gprimary
G03GElectrography15%
Y10TTechnical subjects covered by former us classification10%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments8%
B23BTurning7%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
B23QDetails, components, or accessories for machine tools, e.g. arrangements for copying or controlling4%
B61DBody details or kinds of railway vehicles4%
C07DHeterocyclic compounds4%
H01RElectrically-conductive connections4%
Y02TClimate change mitigation technologies related to transportation4%
PatentTitleYear
10,686,395Brushless motor control device202010,232,820Steering lock device20199,997,884Connector20189,964,278Vehicle lamp20189,761,963'Connector'20179,466,912'Connector'20168,298,010'Connector'20127,833,054'Connector'20107,598,012'Coloring compound and recording material using the same'20097,320,568'Tool holder'20087,296,444'Electric washing machine'20077,181,998'Wrench'20077,165,923'Tool holder'20077,037,053'Tool holder'20067,036,400'Wrench'20067,021,220'Railway vehicle and method for operating vehicle'20067,017,919'Chuck'20066,939,613'Optical member, process of producing optical member, and process of producing thin film'20056,684,848'Direct-injection spark-ignition engine'20046,672,277'Direct-injection spark ignition engine'20046,671,650'Position measuring apparatus and working apparatus using the same'20036,394,466'End mill chucking structure'20026,352,395'Tool holder and tool holder attachment mechanism'20026,240,724'Control device for direct injection engine'20016,105,974'Chuck'20005,784,901'Washing machine'19985,730,562'Clamping apparatus for a spindle of a machine tool'19985,716,173'Tool holder'19985,593,258'Tool holder'19975,507,587'Clamp device for rotary shaft portion'19965,439,415'Rolling stock ventilator and its control method'19955,385,424'Clamp device for rotary shaft portion'19955,286,589'Electrophotographic photosensitive member'19945,263,894'Methods and apparatus for ventilating carriages'19935,238,765'Electrophotographic photosensitive member'19935,189,805'Coordinate measuring machine'19935,187,874'Coordinate measuring machine with protected origin point blocks'19935,137,490'Ventilating equipment for railway rolling stock and operating method thereof'19925,034,294'Electrophotographic photosensitive member with compound having electron donor and acceptor portions'19915,024,912'5H-dibenzo(A,D) cycloheptanylidene derivative and 5H-dibenzo (A,D) cycloheptenylidene derivative, and electrophotographic photosensitive member using the same'19914,931,371'Electrophotographic photosensitive member'19904,830,944'Function separated photosensitive member having a diphenylamine derivative disazo charge generation material'19894,820,602'Electrophotographic photosenitive member comprising disazo compounds having non-symetric coupler portions'19894,810,607'Photosensitive member for electrophotography containing trisazo pigment having pyridylene group in its central skeleton'19894,798,777'Electrophotographic member containing vinylene benzocarazole as charge transporting material'19894,788,119'Electrophotographic photosensitive member containing a disazo pigment'19884,760,003'Electrophotographic photosensitive member containing disazo compound'19884,742,692'Method of air-conditioning and system for the same'19884,743,523'Photosensitive member for electrophotography'19884,735,882'Trisazo photsensitive member for electrophotography'19884,717,636'Electrophotographic photosensitive member containing polyvinylarylal'19884,702,982'Electrophotographic photosensitive member comprising disazo pigment'19874,666,809'Electrophotographic photosensitive member'19874,666,810'Photosensitive member for electrophotography comprising azo pigments'19874,615,965'Method of making photoconductive film and electrophotographic photosensitive member'19864,615,963'Electrophotographic photosensitive member and preparation of photoconductive composition therefor'19864,610,943'Electrophotographic photosensitive member contains disazo photoconductive compound'19864,550,638'Portable keyboard-type musical instrument'19854,427,753'Electrophotographic photosensitive member with disazo or trisazo compound'19844,378,721'Pickup apparatus for an electric string type instrument'19834,287,277'Hologram recording material'19814,258,111'Hologram and method of production thereof with photo-crosslinkable polymers'19814,201,441'Hologram and method of production thereof'19804,172,724'Hologram and method of production thereof'19794,084,473'Electric piano'19784,025,399'Image recording member'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–2009Patents assigned to CANON KK (27)· patent assignee history
1977–2009Based in Yokohama, JP· patent location history
1988–2006Patents assigned to HITACHI LTD (5)· patent assignee history
1988–2006Based in Kudamatsu, JP· patent location history
1993–2003Based in Utsunomiya, JP· patent location history
1995–2008Patents assigned to NIKKEN KOSAKUSHO WORKS LTD (14)· patent assignee history
1997–2008Based in Osaka, JP· patent location history
2001–2004Patents assigned to MAZDA MOTOR (3)· patent assignee history
2005–2018Based in Tokyo, JP· patent location history
2016–2018Patents assigned to JAPAN AVIATION ELECTRONICS IND LTD (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CANON KK271977–2009
NIKKEN KOSAKUSHO WORKS LTD141995–2008
HITACHI LTD51988–2006
JAPAN AVIATION ELECTRONICS IND LTD32016–2018
MAZDA MOTOR32001–2004
Locations
LocationPatentsSpan
Yokohama, JP271977–2009
Osaka, JP101997–2008
Tokyo, JP62005–2018
Kudamatsu, JP51988–2006
Utsunomiya, JP31993–2003