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Data receiver and data transmitter
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Patent number 6,697,886
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Issue date Feb 24, 2004
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Matsushita Electric Industrial Co., Ltd.
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Kenji Muraki
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Training apparatus for singing
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Patent number 5,906,494
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Issue date May 25, 1999
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Matsushita Electric Industrial Co., Ltd.
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Nobuyuki Ogawa
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Training apparatus for singing
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Patent number 5,525,062
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Issue date Jun 11, 1996
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Matsushita Electric Industrial Co. Ltd.
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Nobuyuki Ogawa
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Music training apparatus
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Patent number 5,447,438
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Issue date Sep 5, 1995
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Matsushita Electric Industrial Co., Ltd.
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Kouji Watanabe
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Signal separator
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Patent number 5,400,410
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Issue date Mar 21, 1995
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Matsushita Electric Industrial Co., Ltd.
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Kenji Muraki
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H04 - ELECTRIC COMMUNICATION TECHNIQUE