Ken Takahashi

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Yodogawa-Ku, JP

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Patents Applicationslast 30 patents

Information Patent Application
Speaker Diaphragm
- Publication number 20080027158
- Publication date Jan 31, 2008
- Hiroyuki Ishida
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
Speaker cabinet
- Publication number 20060225950
- Publication date Oct 12, 2006
- Hiroyuki Ishida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE