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Akihiro Akiyama
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Kanagawa, JP
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last 30 patents
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Patent Grant
Speaker apparatus
Patent number
6,057,659
Issue date
May 2, 2000
Sony Corporation
Akihiro Akiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Grant
Stereo loudspeaker system with tweeters mounted on rotatable enlong...
Patent number
5,802,194
Issue date
Sep 1, 1998
Sony Corporation
Makoto Yamagishi
H04 - ELECTRIC COMMUNICATION TECHNIQUE