Shigeji Ohama

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Kyoto, JP

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Patents Grantslast 30 patents

Information Patent Grant
Audio power amplifier IC and audio system provided with the same
- Patent number 7,459,968
- Issue date Dec 2, 2008
- Rohm Co., Ltd.
- Shigeji Ohama
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Bass compensation device and a sound system using the device
- Patent number 7,079,660
- Issue date Jul 18, 2006
- Rohm Co., Ltd.
- Shigeji Ohama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Sound quality regulation apparatus
- Patent number 6,590,984
- Issue date Jul 8, 2003
- Rohm Co., Ltd.
- Shigeji Ohama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
AUDIO SIGNAL AMPLIFIER CIRCUIT WITH A MUTE FUNCTION
- Publication number 20090102550
- Publication date Apr 23, 2009
- Rohm Co., Ltd.
- Shigeji Ohama
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Audio Power Amplifier Ic and Audio System Provided with the Same
- Publication number 20070252644
- Publication date Nov 1, 2007
- Shigeji Ohama
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Bass compensation device and a sound system using the device
- Publication number 20020150255
- Publication date Oct 17, 2002
- Shigeji Ohama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Sound quality regulation apparatus
- Publication number 20020102001
- Publication date Aug 1, 2002
- ROHM CO., LTD.
- Shigeji Ohama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE