Hiroyuki Daichoh

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Saitama-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Speaker comprising ring magnet
- Patent number 6,529,107
- Issue date Mar 4, 2003
- Hitachi Metals Ltd.
- Motoharu Shimizu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
SPEAKER COMPRISING RING MAGNET
- Publication number 20020075110
- Publication date Jun 20, 2002
- Motoharu Shimizu
- H01 - BASIC ELECTRIC ELEMENTS