Shuji Osawa

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Semiconductor device
- Patent number 6,566,728
- Issue date May 20, 2003
- Sanyo Electric Co., LTD
- Shigeaki Okawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semiconductor device and semiconductor electret condenser microphone
- Patent number 6,479,878
- Issue date Nov 12, 2002
- Sanyo Electric Co., LTD
- Shigeaki Okawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of producing semiconductor electret condenser microphone
- Patent number 6,420,203
- Issue date Jul 16, 2002
- Sanyo Electric Co., LTD
- Shigeaki Okawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semiconductor device
- Patent number 6,417,560
- Issue date Jul 9, 2002
- Sanyo Electric Co., LTD
- Shigeaki Okawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Semiconductor device, semiconductor electret condenser microphone,...
- Publication number 20020047173
- Publication date Apr 25, 2002
- Shigeaki Okawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE