Akihito Mitsui

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Speaker unit
- Patent number 8,687,838
- Issue date Apr 1, 2014
- Mitsubishi Pencil Company, Limited
- Akihito Mitsui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Carbonaceous acoustic diaphragm and method for manufacturing the same
- Patent number 8,544,595
- Issue date Oct 1, 2013
- Mitsubishi Pencil Company, Limited
- Takeshi Suzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
SPEAKER UNIT
- Publication number 20120033837
- Publication date Feb 9, 2012
- MITSUBISHI PENCIL COMPANY, LIMITED
- Akihito Mitsui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CARBONACEOUS ACOUSTIC DIAPHRAGM AND METHOD FOR MANUFACTURING THE SAME
- Publication number 20110240401
- Publication date Oct 6, 2011
- MITSUBISHI PENCIL COMPANY, LIMITED
- Takeshi Suzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE