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RYOJI MARUYAMA
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KAWASAKI-SHI, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Electric power calculation system
Patent number
6,496,783
Issue date
Dec 17, 2002
Kabushiki Kaisha Toshiba
Ryoji Maruyama
G01 - MEASURING TESTING
Information
Patent Grant
Power arithmetic apparatus
Patent number
6,473,699
Issue date
Oct 29, 2002
Kabushiki Kaisha Toshiba
Ryoji Maruyama
G01 - MEASURING TESTING
Information
Patent Grant
Arithmetic unit
Patent number
5,924,050
Issue date
Jul 13, 1999
Kabushiki Kaisha Toshiba
Ryoji Maruyama
G01 - MEASURING TESTING
Information
Patent Grant
Electrical quantity measurement device
Patent number
5,554,927
Issue date
Sep 10, 1996
Kabushiki Kaisha Toshiba
Ryoji Maruyama
G01 - MEASURING TESTING
Information
Patent Grant
Hall element for detecting a magnetic field perpendicular to a subs...
Patent number
5,548,151
Issue date
Aug 20, 1996
Kabushiki Kaisha Toshiba
Hideyuki Funaki
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Power multiplication circuit which reduces an offset voltage of a H...
Patent number
5,438,258
Issue date
Aug 1, 1995
Kabushiki Kaisha Toshiba
Ryoji Maruyama
G01 - MEASURING TESTING
Information
Patent Grant
Transmission input/output device with reduced power consumption
Patent number
5,410,594
Issue date
Apr 25, 1995
Kabushiki Kaisha Toshiba
Ryoji Maruyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multiplier
Patent number
4,920,312
Issue date
Apr 24, 1990
Kabushiki Kaisha Toshiba
Ryoji Maruyama
G01 - MEASURING TESTING
Patents Applications
last 30 patents
Information
Patent Application
CHARGING SYSTEM, CHARGING APPARATUS, AND CHARGING METHOD
Publication number
20140176051
Publication date
Jun 26, 2014
KABUSHIKI KAISHA TOSHIBA
Hideki HAYASHI
B60 - VEHICLES IN GENERAL
Information
Patent Application
POWER ARITHMETIC APPARATUS
Publication number
20020013668
Publication date
Jan 31, 2002
Kabushiki Kaisha Toshiba
RYOJI MARUYAMA
G01 - MEASURING TESTING