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Koichi Shiraki
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Tokyo, JP
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last 30 patents
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Patent Grant
Echo canceller for decreasing a deterioration factor of a speech qu...
Patent number
6,445,792
Issue date
Sep 3, 2002
Mitsubishi Denki Kabushiki Kaisha
Koichi Shiraki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Grant
Hands-free telephone
Patent number
5,884,194
Issue date
Mar 16, 1999
Mitsubishi Denki Kabushiki Kaisha
Koichi Shiraki
H04 - ELECTRIC COMMUNICATION TECHNIQUE