Hideki Takahashi

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Yamagata, JP

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Patents Grantslast 30 patents

Information Patent Grant
Speaker diaphragm and production method for speaker diaphragm
- Patent number 9,521,490
- Issue date Dec 13, 2016
- Pioneer Corporation
- Kazuharu Kawata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
SPEAKER DIAPHRAGM AND PRODUCTION METHOD FOR SPEAKER DIAPHRAGM
- Publication number 20150010197
- Publication date Jan 8, 2015
- PIONEER CORPORATION
- Kazuharu Kawata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ACOUSTIC CONVERTER DIAPHRAGM, AND ACOUSTIC CONVERTER
- Publication number 20110026757
- Publication date Feb 3, 2011
- Pioneer Corporation
- Hideki Takahashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE