Hisao Okada

Person

Hitachi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Developing device and electrophotographic apparatus using the same
- Patent number 7,574,164
- Issue date Aug 11, 2009
- Ricoh Company Ltd.
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Color image forming apparatus
- Patent number 7,106,983
- Issue date Sep 12, 2006
- Ricoh Printing Systems, Ltd.
- Masayoshi Nakayama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming method and image forming apparatus
- Patent number 7,090,956
- Issue date Aug 15, 2006
- Ricoh Printing Systems, Ltd.
- Katsuhiko Suzuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electronic photographing apparatus
- Patent number 6,954,604
- Issue date Oct 11, 2005
- Ricoh Printing Systems, Ltd.
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus with transfer bias inverting function
- Patent number 6,829,449
- Issue date Dec 7, 2004
- Hitachi Printing Solutions, Ltd.
- Hiroyoshi Matsumoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electro-photographic developing unit
- Patent number 6,813,462
- Issue date Nov 2, 2004
- Hitachi Printing Solutions, Ltd.
- Teruaki Mitsuya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic apparatus having a fringe development preventin...
- Patent number 6,556,229
- Issue date Apr 29, 2003
- Hitachi Koki Co., Ltd.
- Teruaki Mitsuya
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image forming apparatus having developing supporters
- Patent number 6,507,715
- Issue date Jan 14, 2003
- Hitachi Koki Co., Ltd.
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming electrophotography apparatus and magnetic developing...
- Patent number 6,487,384
- Issue date Nov 26, 2002
- Hitachi Koki Co., Ltd.
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing roll, developing device using the same and electrophotog...
- Patent number 6,480,691
- Issue date Nov 12, 2002
- Hitachi Koki Co., Ltd.
- Hisao Okada
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Developing device for image forming apparatus
- Patent number 6,345,163
- Issue date Feb 5, 2002
- Hitachi Koki Co. Ltd.
- Katsuhiko Suzuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic printing apparatus using electric potential div...
- Patent number 6,131,000
- Issue date Oct 10, 2000
- Hitachi, Ltd.
- Shinichi Akatsu
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Two-color image forming apparatus that prevents fringe development
- Patent number 6,061,534
- Issue date May 9, 2000
- Hitachi Koki Co., Ltd.
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic apparatus
- Patent number 5,923,933
- Issue date Jul 13, 1999
- Hitachi Koki Co., Ltd.
- Masayasu Anzai
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device
- Patent number 5,907,755
- Issue date May 25, 1999
- Hitachi Koki Co., Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Light exposure controlling method of electrophotographic apparatus...
- Patent number 5,884,119
- Issue date Mar 16, 1999
- Hitachi, Ltd.
- Seiji Maruo
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image formation method and image formation apparatus
- Patent number 5,745,818
- Issue date Apr 28, 1998
- Hitachi, Ltd.
- Takao Kumasaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Integrated printing system for automated and maintenance free opera...
- Patent number 5,548,375
- Issue date Aug 20, 1996
- Hitachi, Ltd.
- Teruaki Mitsuya
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Printing and binding apparatus
- Patent number 5,331,387
- Issue date Jul 19, 1994
- Hitachi, Ltd.
- Hisao Okada
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Grant
Fan-shape scanning ultrasonic flaw detecting apparatus
- Patent number 5,024,093
- Issue date Jun 18, 1991
- Hitachi, Ltd.
- Souji Sasaki
- G01 - MEASURING TESTING
Information Patent Grant
Tablet type coordinate input apparatus using elastic wave
- Patent number 4,665,282
- Issue date May 12, 1987
- Hitachi, Ltd.
- Ichiya Sato
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
Developing device and electrophotographic apparatus using the same
- Publication number 20070172262
- Publication date Jul 26, 2007
- Ricoh Printing Systems, Ltd.
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Color image forming apparatus
- Publication number 20050063721
- Publication date Mar 24, 2005
- Hitachi Printing Solutions, Ltd.
- Masayoshi Nakayama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Electronic photographing apparatus
- Publication number 20040184842
- Publication date Sep 23, 2004
- Hitachi Printing Solutions, Ltd.
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus
- Publication number 20040052541
- Publication date Mar 18, 2004
- HITACHI PRINTING SOLUTIONS, LTD.
- Hiroyoshi Matsumoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Developing unit and electro-photographic apparatus
- Publication number 20030143001
- Publication date Jul 31, 2003
- HITACHI PRINTING SOLUTIONS, LTD.
- Teruaki Mitsuya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming method and image forming apparatus
- Publication number 20020127488
- Publication date Sep 12, 2002
- Katsuhiko Suzuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus and developing unit used therein
- Publication number 20020057930
- Publication date May 16, 2002
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus
- Publication number 20020003967
- Publication date Jan 10, 2002
- HITACHI KOKI CO., LTD.
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Developing roll, developing device using the same and electrophotog...
- Publication number 20010048827
- Publication date Dec 6, 2001
- HITACHI KOKI CO., LTD.
- Hisao Okada
- B82 - NANO-TECHNOLOGY
Information Patent Application
Electrophotographic apparatus
- Publication number 20010030680
- Publication date Oct 18, 2001
- Teruaki Mitsuya
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Hisao Okada

Person

Patents Grantslast 30 patents

Developing device and electrophotographic apparatus using the same

Color image forming apparatus

Image forming method and image forming apparatus

Electronic photographing apparatus

Image forming apparatus with transfer bias inverting function

Electro-photographic developing unit

Electrophotographic apparatus having a fringe development preventin...

Image forming apparatus having developing supporters

Image forming electrophotography apparatus and magnetic developing...

Developing roll, developing device using the same and electrophotog...

Developing device for image forming apparatus

Electrophotographic printing apparatus using electric potential div...

Two-color image forming apparatus that prevents fringe development

Electrophotographic apparatus

Developing device

Light exposure controlling method of electrophotographic apparatus...

Image formation method and image formation apparatus

Integrated printing system for automated and maintenance free opera...

Printing and binding apparatus

Fan-shape scanning ultrasonic flaw detecting apparatus

Tablet type coordinate input apparatus using elastic wave

Patents Applicationslast 30 patents

Developing device and electrophotographic apparatus using the same

Color image forming apparatus

Electronic photographing apparatus

Image forming apparatus

Developing unit and electro-photographic apparatus

Image forming method and image forming apparatus

Image forming apparatus and developing unit used therein

Image forming apparatus

Developing roll, developing device using the same and electrophotog...

Electrophotographic apparatus