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Osaka-fu, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Switching converter circuit
Patent number
8,541,998
Issue date
Sep 24, 2013
Ricoh Company, Ltd.
Shunsei Tanaka
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Overcurrent protection circuit and voltage regulator incorporating...
Patent number
7,969,703
Issue date
Jun 28, 2011
Ricoh Company, Ltd.
Shunsei Tanaka
G05 - CONTROLLING REGULATING
Information
Patent Grant
Charge pump circuit with control circuitry
Patent number
7,893,752
Issue date
Feb 22, 2011
Ricoh Company, Ltd.
Shunsei Tanaka
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Constant voltage power supply circuit and method of controlling the...
Patent number
7,782,034
Issue date
Aug 24, 2010
Ricoh Company, Ltd.
Shunsei Tanaka
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Constant-voltage power circuit with fold back current limiting capa...
Patent number
7,548,044
Issue date
Jun 16, 2009
Ricoh Company, Ltd.
Kohzoh Itoh
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Constant voltage power supply circuit and method of controlling the...
Patent number
7,408,331
Issue date
Aug 5, 2008
Ricoh Company, Ltd.
Shunsei Tanaka
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Constant-voltage power circuit with fold back current limiting capa...
Patent number
7,183,755
Issue date
Feb 27, 2007
Ricoh Company, Ltd.
Kohzoh Itoh
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Patents Applications
last 30 patents
Information
Patent Application
SWITCHING CONVERTER CIRCUIT
Publication number
20120049814
Publication date
Mar 1, 2012
RICOH COMPANY, LTD.
Shunsei TANAKA
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
SOUND AND MUSIC PLAYBACK DEVICE
Publication number
20110187452
Publication date
Aug 4, 2011
RICOH COMPANY, LTD.
Yukihiro Imai
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Application
Overcurrent protection circuit and voltage regulator incorporating...
Publication number
20090180231
Publication date
Jul 16, 2009
RICOH COMPANY, LTD.
Shunsei Tanaka
G05 - CONTROLLING REGULATING
Information
Patent Application
CHARGE PUMP CIRCUIT
Publication number
20090002064
Publication date
Jan 1, 2009
Shunsei Tanaka
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
CONSTANT VOLTAGE POWER SUPPLY CIRCUIT AND METHOD OF CONTROLLING THE...
Publication number
20080272754
Publication date
Nov 6, 2008
Shunsei Tanaka
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Constant-voltage power circuit with fold back current limiting capa...
Publication number
20070114982
Publication date
May 24, 2007
Kohzoh Itoh
G05 - CONTROLLING REGULATING
Information
Patent Application
Constant voltage power supply circuit and method of controlling the...
Publication number
20060267567
Publication date
Nov 30, 2006
Shunsei Tanaka
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Constant-voltage power circuit with fold back current limiting capa...
Publication number
20060250740
Publication date
Nov 9, 2006
Kohzoh Itoh
G05 - CONTROLLING REGULATING