Yasuo Sawada

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical information recording medium and information recording meth...
- Patent number 7,236,448
- Issue date Jun 26, 2007
- Ricoh Company, Ltd.
- Yasuo Sawada
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording medium with ROM area having pre-pits
- Patent number 7,187,642
- Issue date Mar 6, 2007
- Ricoh Company, Ltd.
- Yasuo Sawada
- G11 - INFORMATION STORAGE
Information Patent Grant
Device and method for recording data to optical disk using multi-pu...
- Patent number 7,106,680
- Issue date Sep 12, 2006
- Ricoh Company, Ltd.
- Masaki Kato
- G11 - INFORMATION STORAGE
Information Patent Grant
Information recording medium and manufacturing method thereof
- Patent number 6,982,110
- Issue date Jan 3, 2006
- Ricoh Company, Ltd.
- Hisamitsu Kamezaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording medium and method of information recording/readin...
- Patent number 6,469,963
- Issue date Oct 22, 2002
- Ricoh Company, Ltd.
- Yasuo Sawada
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording medium and method of information recording/readin...
- Patent number 6,137,769
- Issue date Oct 24, 2000
- Ricoh Company, Ltd.
- Yasuo Sawada
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording medium
- Patent number 5,316,814
- Issue date May 31, 1994
- Ricoh Company, Ltd.
- Yasuo Sawada
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording medium
- Patent number 4,839,226
- Issue date Jun 13, 1989
- Ricoh Company, Ltd.
- Yasuo Sawada
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto optical recording medium
- Patent number 4,690,861
- Issue date Sep 1, 1987
- Ricoh Co., Ltd.
- Hitoshi Nakamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Toner concentration control apparatus
- Patent number 4,389,972
- Issue date Jun 28, 1983
- Ricoh Company, Ltd.
- Koji Hirakura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner concentration control apparatus
- Patent number 4,369,733
- Issue date Jan 25, 1983
- Ricoh Company, Ltd.
- Koji Hirakura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner developing ability measuring system for electrostatography
- Patent number 4,266,141
- Issue date May 5, 1981
- Ricoh Company, Ltd.
- Koji Hirakura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
Optical information recording medium with ROM area having pre-pits
- Publication number 20060002284
- Publication date Jan 5, 2006
- Yasuo Sawada
- G11 - INFORMATION STORAGE
Information Patent Application
Information recording apparatus and information recording method
- Publication number 20040114488
- Publication date Jun 17, 2004
- Yasuo Sawada
- G11 - INFORMATION STORAGE
Information Patent Application
Information recording method, information recording apparatus, and...
- Publication number 20030227850
- Publication date Dec 11, 2003
- Masaki Kato
- G11 - INFORMATION STORAGE
Information Patent Application
Optical information recording medium
- Publication number 20030090989
- Publication date May 15, 2003
- Yasuo Sawada
- G11 - INFORMATION STORAGE
Information Patent Application
Optical information recording medium and information recording meth...
- Publication number 20030048735
- Publication date Mar 13, 2003
- Ricoh Company, Ltd.
- Yasuo Sawada
- G11 - INFORMATION STORAGE
Information Patent Application
Information recording medium and manufacturing method thereof
- Publication number 20030007448
- Publication date Jan 9, 2003
- Ricoh Company, Ltd.
- Hisamitsu Kamezaki
- G11 - INFORMATION STORAGE

Yasuo Sawada

Person

Patents Grantslast 30 patents

Optical information recording medium and information recording meth...

Optical information recording medium with ROM area having pre-pits

Device and method for recording data to optical disk using multi-pu...

Information recording medium and manufacturing method thereof

Optical recording medium and method of information recording/readin...

Optical recording medium and method of information recording/readin...

Optical information recording medium

Magneto-optical recording medium

Magneto optical recording medium

Toner concentration control apparatus

Toner concentration control apparatus

Toner developing ability measuring system for electrostatography

Patents Applicationslast 30 patents

Optical information recording medium with ROM area having pre-pits

Information recording apparatus and information recording method

Information recording method, information recording apparatus, and...

Optical information recording medium

Optical information recording medium and information recording meth...

Information recording medium and manufacturing method thereof