Kouichi Honma

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Mitsuke-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Magnesium diaphragm, method of manufacturing the same, and speaker...
- Patent number 7,454,032
- Issue date Nov 18, 2008
- Pioneer Corporation
- Hiroyuki Tomiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Magnesium diaphragm, method of manufacturing the same, and speaker...
- Publication number 20050041828
- Publication date Feb 24, 2005
- Pioneer Corporation
- Hiroyuki Tomiyama
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR