Koichi Yamasaki

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Kyoto, JP

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Patents Grantslast 30 patents

Information Patent Grant
Charge/discharge control circuit and charging type power supply device
- Patent number 6,504,345
- Issue date Jan 7, 2003
- Seiko Instruments Inc.
- Atsushi Sakurai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Delay circuit
- Patent number 6,388,491
- Issue date May 14, 2002
- Seiko Instruments Inc.
- Koichi Yamasaki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Differential amplifier
- Patent number 6,181,202
- Issue date Jan 30, 2001
- Seiko Instruments Inc.
- Koichi Yamasaki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Power source circuit and electronic device with the same
- Patent number 6,087,814
- Issue date Jul 11, 2000
- Rohm Co., Ltd.
- Koichi Yamasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semiconductor integrated circuit device and lead frame therefor
- Patent number 5,917,237
- Issue date Jun 29, 1999
- Rohm Co., Ltd.
- Satoshi Furuno
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Voltage step-up circuit and its control circuit
- Patent number 5,789,905
- Issue date Aug 4, 1998
- Rohm Co., Ltd.
- Koichi Yamasaki
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method of manufacturing a semiconductor integrated circuit device
- Patent number 5,686,362
- Issue date Nov 11, 1997
- Rohm Co., Ltd.
- Satoshi Furuno
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Charge/discharge control circuit and charging type power supply device
- Publication number 20010052759
- Publication date Dec 20, 2001
- Atsushi Sakurai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER