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Kuniaki ARAI
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Protective semiconductor device for secondary cell
Patent number
9,276,398
Issue date
Mar 1, 2016
Ricoh Company, Ltd.
Masashi Oshima
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Secondary cell protection circuit and battery
Patent number
9,106,081
Issue date
Aug 11, 2015
RICOH ELECTRONIC DEVICES CO., LTD.
Kuniaki Arai
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Charging control circuit capable of constant current charging
Patent number
8,242,747
Issue date
Aug 14, 2012
Ricoh Company, Ltd.
Kuniaki Arai
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Optical disc apparatus, information recording method, adjustment ap...
Patent number
7,224,652
Issue date
May 29, 2007
Ricoh Company, Ltd.
Kuniaki Arai
G11 - INFORMATION STORAGE
Information
Patent Grant
Wobbling signal demodulation method, wobbling signal demodulation c...
Patent number
7,173,890
Issue date
Feb 6, 2007
Ricoh Company, Ltd.
Kuniaki Arai
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disk apparatus having a plurality of drawer detection sensors
Patent number
7,069,566
Issue date
Jun 27, 2006
Ricoh Company, Ltd.
Kuniaki Arai
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
PROTECTIVE SEMICONDUCTOR DEVICE FOR SECONDARY CELL
Publication number
20130242446
Publication date
Sep 19, 2013
RICOH COMPANY, LTD.
Masashi Oshima
G01 - MEASURING TESTING
Information
Patent Application
CHARGE CONTROL CIRCUIT AND BATTERY DEVICE
Publication number
20130241471
Publication date
Sep 19, 2013
RICOH COMPANY, LTD.
Kuniaki ARAI
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
SECONDARY CELL PROTECTION CIRCUIT AND BATTERY
Publication number
20120306451
Publication date
Dec 6, 2012
RICOH COMPANY, LTD.
Kuniaki Arai
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
CHARGING CONTROL CIRCUIT CAPABLE OF CONSTANT CURRENT CHARGING
Publication number
20090224726
Publication date
Sep 10, 2009
RICOH COMPANY, LTD.
Kuniaki ARAI
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
Wobbling signal demodulation method, wobbling signal demodulation c...
Publication number
20050078588
Publication date
Apr 14, 2005
Kuniaki Arai
G11 - INFORMATION STORAGE
Information
Patent Application
Optical disc apparatus, information recording method, adjustment ap...
Publication number
20050047297
Publication date
Mar 3, 2005
Kuniaki Arai
G11 - INFORMATION STORAGE
Information
Patent Application
Optical disk apparatus having a plurality of drawer detection sensors
Publication number
20040148616
Publication date
Jul 29, 2004
Kuniaki Arai
G11 - INFORMATION STORAGE