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Kawasaki-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Multilayer information recording medium, information recorder, and...
Patent number
7,924,676
Issue date
Apr 12, 2011
Ricoh Company, Ltd.
Tetsuya Ogata
G11 - INFORMATION STORAGE
Information
Patent Grant
Data readout method, data readout device, and optical disk
Patent number
7,885,155
Issue date
Feb 8, 2011
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording apparatus that can achieve uniform signal cha...
Patent number
7,848,201
Issue date
Dec 7, 2010
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording method, information recording apparatus, opti...
Patent number
7,751,294
Issue date
Jul 6, 2010
Ricoh Company, Ltd.
Kohji Takeuchi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording method, information recording device, and rec...
Patent number
7,512,050
Issue date
Mar 31, 2009
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording method and information recording apparatus th...
Patent number
7,426,166
Issue date
Sep 16, 2008
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording method, recording optical disc, and informati...
Patent number
7,420,901
Issue date
Sep 2, 2008
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording device
Patent number
7,388,821
Issue date
Jun 17, 2008
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording method and apparatus
Patent number
7,313,075
Issue date
Dec 25, 2007
Ricoh Company, Ltd.
Naruhiro Masui
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording medium with a partition wall between...
Patent number
7,239,602
Issue date
Jul 3, 2007
Ricoh Company, Ltd.
Akihiko Shimizu
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording employing improved recording power co...
Patent number
7,019,273
Issue date
Mar 28, 2006
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording device
Patent number
7,006,419
Issue date
Feb 28, 2006
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording with effective pulse control scheme
Patent number
6,801,240
Issue date
Oct 5, 2004
Ricoh Company, Ltd.
Michiharu Abe
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording employing improved recording power co...
Patent number
6,781,105
Issue date
Aug 24, 2004
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording apparatus and method
Patent number
6,771,577
Issue date
Aug 3, 2004
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording employing improved recording power co...
Patent number
6,664,526
Issue date
Dec 16, 2003
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording method and apparatus
Patent number
6,600,712
Issue date
Jul 29, 2003
Ricoh Company, Ltd.
Naruhiro Masui
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical recording and reproducing methods for optical disk
Patent number
6,487,149
Issue date
Nov 26, 2002
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording apparatus and method
Patent number
6,459,666
Issue date
Oct 1, 2002
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording method
Patent number
6,426,929
Issue date
Jul 30, 2002
Ricoh Company, Ltd.
Teruyasu Watabe
G11 - INFORMATION STORAGE
Information
Patent Grant
Information recording apparatus, method and computer program product
Patent number
5,732,062
Issue date
Mar 24, 1998
Ricoh Company, Ltd.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Grant
Liquid crystal display device with dielectric anisotropy
Patent number
5,056,896
Issue date
Oct 15, 1991
Ricoh Company, Ltd.
Haruo Iimura
G02 - OPTICS
Information
Patent Grant
Liquid crystal display device
Patent number
4,984,873
Issue date
Jan 15, 1991
Ricoh Company, Ltd.
Yasuyuki Takiguchi
G02 - OPTICS
Information
Patent Grant
Projection device for irradiating a light to a display device and o...
Patent number
4,818,074
Issue date
Apr 4, 1989
Ricoh Company, Ltd.
Kenya Yokoi
G02 - OPTICS
Patents Applications
last 30 patents
Information
Patent Application
Information recording apparatus that can achieve uniform signal cha...
Publication number
20080253253
Publication date
Oct 16, 2008
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
Data readout method, data readout device, and optical disk
Publication number
20080025190
Publication date
Jan 31, 2008
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
Multilayer Information Recording Medium, Information Recorder, and...
Publication number
20070230308
Publication date
Oct 4, 2007
Tetsuya Ogata
G11 - INFORMATION STORAGE
Information
Patent Application
Information recording method, information recording apparatus, opti...
Publication number
20060262694
Publication date
Nov 23, 2006
Kohji Takeuchi
G11 - INFORMATION STORAGE
Information
Patent Application
Information recording method, information recording device and reco...
Publication number
20060245336
Publication date
Nov 2, 2006
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
Information recording device
Publication number
20060146670
Publication date
Jul 6, 2006
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
Optical information recording medium and method of producing a mast...
Publication number
20060028975
Publication date
Feb 9, 2006
AKIHIKO SHIMIZU
G11 - INFORMATION STORAGE
Information
Patent Application
Information recording method, recording optical disc, and informati...
Publication number
20060013090
Publication date
Jan 19, 2006
RICOH COMPANY, LTD.
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
Optical information recording employing improved recording power co...
Publication number
20050259549
Publication date
Nov 24, 2005
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
Information recording method and information recording apparatus th...
Publication number
20050013229
Publication date
Jan 20, 2005
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
Optical information recording employing improved recording power co...
Publication number
20040011945
Publication date
Jan 22, 2004
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
Optical information recording method and apparatus
Publication number
20030189885
Publication date
Oct 9, 2003
Naruhiro Masui
G11 - INFORMATION STORAGE
Information
Patent Application
Information recording device
Publication number
20030156519
Publication date
Aug 21, 2003
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
Information recording apparatus and method
Publication number
20030090981
Publication date
May 15, 2003
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
Information recording with effective pulse control scheme
Publication number
20020196324
Publication date
Dec 26, 2002
Michiharu Abe
G11 - INFORMATION STORAGE
Information
Patent Application
Optical information recording employing improved recording power co...
Publication number
20020085470
Publication date
Jul 4, 2002
Kenya Yokoi
G11 - INFORMATION STORAGE
Information
Patent Application
OPTICAL INFORMATION RECORDING MEDIUM AND MASTERING METHOD THEREFOR
Publication number
20020071380
Publication date
Jun 13, 2002
AKIHIKO SHIMIZU
G11 - INFORMATION STORAGE