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Loudspeaker
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Patent number 5,594,805
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Issue date Jan 14, 1997
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Kabushiki Kaisha Kenwood
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Yoshio Sakamoto
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Wiring structure of loudspeaker
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Patent number 5,091,958
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Issue date Feb 25, 1992
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Kabushiki Kaisha Kenwood
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Yoshio Sakamoto
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Speaker diaphragm
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Patent number 5,031,720
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Issue date Jul 16, 1991
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Kabushiki Kaisha Kenwood
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Shuhei Ohta
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Speaker system
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Patent number 4,146,111
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Issue date Mar 27, 1979
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Trio Kabushiki Kaisha
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Yutaka Mae
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H04 - ELECTRIC COMMUNICATION TECHNIQUE