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Yoshikatsu Matsubara
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Hamamatsu-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Electrostatic loudspeaker
Patent number
8,983,099
Issue date
Mar 17, 2015
Yamaha Corporation
Yasuaki Takano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Electrostatic speaker
Patent number
8,666,097
Issue date
Mar 4, 2014
Yamaha Corporation
Hiromi Ichikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Earphone device and sound generating apparatus equipped with the same
Patent number
8,320,601
Issue date
Nov 27, 2012
Yamaha Corporation
Souichi Takigawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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 Applications
last 30 patents
Information
Patent Application
ELECTROSTATIC LOUDSPEAKER
Publication number
20130108087
Publication date
May 2, 2013
YAMAHA CORPORATION
Yasuaki Takano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ELECTROSTATIC SPEAKER
Publication number
20110075869
Publication date
Mar 31, 2011
Yamaha Corporation
Hiromi Ichikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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
Information
Patent Application
EARPHONE DEVICE AND SOUND GENERATING APPARATUS EQUIPPED WITH THE SAME
Publication number
20090285437
Publication date
Nov 19, 2009
Yamaha Corporation
Souichi Takigawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE