Tatsuo Igawa

Person

Kitaibaraki-shi, Ibaraki-ken, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Ink-jet recording head and ink-jet recorder
- Patent number 6,604,816
- Issue date Aug 12, 2003
- Hitachi, Ltd.
- Seiji Yonekura
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Ink jet recorder
- Patent number 6,557,981
- Issue date May 6, 2003
- Hitachi, Ltd.
- Yoshinobu Fukano
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Recording head and inkjet recording device having separately arrang...
- Patent number 6,443,560
- Issue date Sep 3, 2002
- Hitachi, Ltd.
- Mamoru Okano
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Developing apparatus and picture image forming apparatus
- Patent number 5,860,049
- Issue date Jan 12, 1999
- Hitachi, Ltd.
- Takao Kumasaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing apparatus and color electrophotographic apparatus using...
- Patent number 5,832,350
- Issue date Nov 3, 1998
- Hitachi, Ltd.
- Takao Kumasaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing apparatus for an electrophotographic machine
- Patent number 5,574,546
- Issue date Nov 12, 1996
- Hitachi, Ltd.
- Takao Kumasaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic recording apparatus with electrified cap and managing...
- Patent number 5,559,578
- Issue date Sep 24, 1996
- Hitachi, Ltd.
- Takao Umeda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic recording apparatus and managing system thereof
- Patent number 5,373,351
- Issue date Dec 13, 1994
- Hitachi, Ltd.
- Takao Umeda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus capable of preventing the winding on the im...
- Patent number 5,321,477
- Issue date Jun 14, 1994
- Hitachi, Ltd.
- Tetuya Nagata
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image formation apparatus having tuck prevention control means
- Patent number 5,291,228
- Issue date Mar 1, 1994
- Hitachi, Ltd.
- Nagata Tetsuya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Multiplexed driving method for an electrooptical device, and circui...
- Patent number 5,252,954
- Issue date Oct 12, 1993
- Hitachi, Ltd.
- Tetsuya Nagata
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Electrostatic recorder and electrostatic latent image measuring ins...
- Patent number 5,177,531
- Issue date Jan 5, 1993
- Hitachi, Ltd.
- Toru Miyasaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Apparatus and method for driving an optical printer having a liquid...
- Patent number 5,095,376
- Issue date Mar 10, 1992
- Hitachi, Ltd.
- Takao Umeda
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Time-sharing drive liquid crystal optical switch array and optical...
- Patent number 4,783,149
- Issue date Nov 8, 1988
- Hitachi, Ltd.
- Takao Umeda
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Printer utilizing optical switch elements
- Patent number 4,769,659
- Issue date Sep 6, 1988
- Takao Umeda
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Multiplexed driving method for an optical switching element employi...
- Patent number 4,746,196
- Issue date May 24, 1988
- Hitachi, Ltd.
- Takao Umeda
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Driving ferroelectric liquid crystal printers via short circuiting
- Patent number 4,712,876
- Issue date Dec 15, 1987
- Hitachi, Ltd.
- Takao Umeda
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Driving method and apparatus for optical printer with liquid-crysta...
- Patent number 4,591,886
- Issue date May 27, 1986
- Hitachi, Ltd.
- Takao Umeda
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Display panel having uniaxially-stretched organic polymer film as t...
- Patent number 4,586,790
- Issue date May 6, 1986
- Hitachi, Ltd.
- Takao Umeda
- G02 - OPTICS
Information Patent Grant
Liquid crystal display device
- Patent number 4,505,546
- Issue date Mar 19, 1985
- Hitachi, Ltd.
- Takao Umeda
- G02 - OPTICS
Information Patent Grant
Ignition distributor
- Patent number 4,468,543
- Issue date Aug 28, 1984
- Nissan Motor Company, Limited
- Masazumi Sone
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Liquid crystal display element with gap controlling material and pr...
- Patent number 4,362,771
- Issue date Dec 7, 1982
- Hitachi, Ltd.
- Takao Umeda
- G02 - OPTICS
Information Patent Grant
Distributor
- Patent number 4,345,120
- Issue date Aug 17, 1982
- Nissan Motor Company, Limited
- Hiroji Sawada
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Distributor with coated alkaline earth oxide electrode
- Patent number 4,219,707
- Issue date Aug 26, 1980
- Hitachi, Ltd.
- Hiroji Sawada
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Method for manufacturing gas insulated electrical apparatus
- Patent number 4,145,101
- Issue date Mar 20, 1979
- Hitachi, Ltd.
- Ryozo Takeuchi
- H01 - BASIC ELECTRIC ELEMENTS

Tatsuo Igawa

Person

Patents Grantslast 30 patents

Ink-jet recording head and ink-jet recorder

Ink jet recorder

Recording head and inkjet recording device having separately arrang...

Developing apparatus and picture image forming apparatus

Developing apparatus and color electrophotographic apparatus using...

Developing apparatus for an electrophotographic machine

Electrostatic recording apparatus with electrified cap and managing...

Electrostatic recording apparatus and managing system thereof

Image forming apparatus capable of preventing the winding on the im...

Image formation apparatus having tuck prevention control means

Multiplexed driving method for an electrooptical device, and circui...

Electrostatic recorder and electrostatic latent image measuring ins...

Apparatus and method for driving an optical printer having a liquid...

Time-sharing drive liquid crystal optical switch array and optical...

Printer utilizing optical switch elements

Multiplexed driving method for an optical switching element employi...

Driving ferroelectric liquid crystal printers via short circuiting

Driving method and apparatus for optical printer with liquid-crysta...

Display panel having uniaxially-stretched organic polymer film as t...

Liquid crystal display device

Ignition distributor

Liquid crystal display element with gap controlling material and pr...

Distributor

Distributor with coated alkaline earth oxide electrode

Method for manufacturing gas insulated electrical apparatus