Tsuneyasu Demukai

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Hamamatsu-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Earphone device and sound generating apparatus equipped with the same
- Patent number 8,270,657
- Issue date Sep 18, 2012
- Yamaha Corporation
- Souichi Takigawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Earphone device, sound tube forming a part of earphone device and s...
- Patent number 8,090,134
- Issue date Jan 3, 2012
- Yamaha Corporation
- Souichi Takigawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
EARPHONE DEVICE AND SOUND GENERATING APPARATUS EQUIPPED WITH THE SAME
- Publication number 20100166245
- Publication date Jul 1, 2010
- Yamaha Corporation
- Souichi Takigawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
EARPHONE DEVICE, SOUND TUBE FORMING A PART OF EARPHONE DEVICE AND S...
- Publication number 20100061582
- Publication date Mar 11, 2010
- Yamaha Corporation
- Souichi Takigawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE