Inventor

Yoshio Takasu

Inventor

Tama, JP

Overview

1978–2012

Patent span

Physics

Primary field (CPC G)

Patents· 54 as inventor

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

G03Gprimary

G03GElectrography25%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests19%

G11BInformation storage based on relative movement between record carrier and transducer11%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments6%

Y10TTechnical subjects covered by former us classification5%

C07CAcyclic or carbocyclic compounds4%

C07DHeterocyclic compounds4%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices3%

D06MTreatment, not provided for elsewhere in class d06, of fibres, threads, yarns, fabrics, feathers or fibrous goods made from such materials2%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein2%

PatentTitleYear

8,338,323'Electrode for electrochemical reaction and production process thereof'2012 7,858,551'Electrode catalyst for electrochemical reaction, process for producing the electrode catalyst and electrode for electrochemical reaction having the electrode catalyst'2010 7,514,065'Ruthenic acid nanosheet and production method thereof'2009 6,562,313'Electrode material for electrochemical capacitor, electrochemical capacitor comprising the same, and method for the production of the same'2003 5,712,066'Image forming method, recording medium, and visible image reproducing method'1998 5,663,032'Photosensitive composition containing photosensitive and heat developable element and polymer element and image-forming method utilizing the same'1997 5,527,650'Image forming method recording medium and visible image reproducing medium'1996 5,382,497'Optical recording medium and process for recording thereupon'1995 5,320,930'Optical recording medium and process for recording thereon'1994 5,278,026'Optical recording medium and process for recording thereupon'1994 5,258,129'Fluid-permeable agent for non-woven sheets of polyolefin fibers and method of application thereof'1993 5,178,995'Optical information recording medium'1993 5,124,235'Photopolymerization initiator and photosensitive composition employing the same'1992 5,079,128'Optical recording medium and process for recording thereupon'1992 5,079,127'Optical recording medium and process for recording thereupon'1992 5,041,369'Photosensitive material and image forming method'1991 5,004,667'Photosensitive material, and image formation process and image formation apparatus using same'1991 5,001,032'Photosensitive material containing a photosensitive and heat developable element and a polymerizable layer and image-forming method utilizing the same'1991 4,995,705'Device, method and apparatus for optical modulation using ferroelectric polymer liquid crystals'1991 4,988,449'Fluid-permeable agent for non-woven sheets of polyolefin fibers'1991 4,957,854'Optical recording medium'1990 4,945,833'Printing process using a pH change to transfer a thin layer of ink to a printing plate'1990 4,923,390'Optical recording medium IR-ray absorptive compound and optical recording medium by use thereof'1990 4,921,622'Fluid-permeable agent for non-woven sheets of polyolefin fibers and method of application thereof: N,N-di-hydroxyethyl amide and polyoxyalkylene-modified silicone'1990 4,899,168'Optical recording medium'1990 4,816,840'Optical recording medium and method for producing the same'1989 4,760,007'Process of developing latent electrostatic image using dry magnetic developer'1988 4,745,030'Electrostatic recording device'1988 4,738,908'Photothermal transducing type of recording medium'1988 4,734,359'Thermal recording material for display and image display device utilizing the same'1988 4,693,951'Image forming method and image bearing member'1987 4,675,767'Opto-magnetic recording medium'1987 4,673,630'Photoconductive film and electrophotographic photosensitive member contains azulenium salt'1987 4,629,670'Photoconductive film of azulenium salt and electrophotographic photosensitive member'1986 4,614,951'Optical recording medium'1986 4,579,799'Photoconductive film electrophotographic photosensitive member therewith'1986 4,565,761'Electrophotographic process utilizing an azulenium salt-containing photosensitive member'1986 4,551,404'Disazo electrophotographic photosensitive member'1985 4,548,886'Radiation sensitive organic thin film comprising an azulenium salt'1985 4,481,273'Electrophotographic photosensitive member and preparation thereof'1984 4,471,694'Printing process for transferring fixed image from master'1984 4,456,671'Electrophotographic photosensitive member having a photosensitive layer containing a hydrazone compound'1984 4,454,211'Electrophotographic photosensitive member with pyrazoline charge transport material'1984 4,446,217'Electrophotographic photosensitive member having a hydrazone containing layer'1984 4,427,753'Electrophotographic photosensitive member with disazo or trisazo compound'1984 4,423,129'Electrophotographic member having layer containing methylidenyl hydrazone compound'1983 4,399,208'Electrophotographic photosensitive member'1983 4,340,660'Toner for development having crosslinked polymers'1982 4,336,318'Electrostatic image developing method'1982 4,299,900'Electrostatic image magnetic developing process'1981 4,258,116'Process for developing electrostatic latent images'1981 4,163,892'Fixing apparatus'1979 4,132,882'Process and apparatus for fixing toner with heat and a fixing agent'1979 4,097,277'Photosensitive member having layer of vinyl carbazole polymer containing antimony chalcogen compound of antimony and sulfur'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1998Patents assigned to CANON KK (47)· patent assignee history

1978–1993Based in Tokyo, JP· patent location history

1981–1998Based in Tama, JP· patent location history

1981–1988Based in Toride, JP· patent location history

1984–1985Patents assigned to COPYER CO (3)· patent assignee history

1990–1993Patents assigned to TAKEMOTO OIL & FAT CO LTD (3)· patent assignee history

1990–1993Based in Aichi, JP· patent location history

2003–2010Based in Ueda, JP· patent location history

2009–2012Patents assigned to SUGIMOTO WATARU (2)· patent assignee history

2010–2012Patents assigned to PERMELEC ELECTRODE LTD (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CANON KK	47	1978–1998
COPYER CO	3	1984–1985
TAKEMOTO OIL & FAT CO LTD	3	1990–1993
PERMELEC ELECTRODE LTD	2	2010–2012
SUGIMOTO WATARU	2	2009–2012

Locations

Location	Patents	Span
Tama, JP	41	1981–1998
Tokyo, JP	4	1978–1993
Ueda, JP	3	2003–2010
Aichi, JP	3	1990–1993
Toride, JP	2	1981–1988