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Piezoelectric vibration transducer
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Patent number 4,424,465
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Issue date Jan 3, 1984
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Toray Industries, Inc.
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Hiroji Ohigashi
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B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
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Ultrasonic transducer element
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Patent number 4,395,652
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Issue date Jul 26, 1983
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Toray Industries, Inc.
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Toshiharu Nakanishi
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Electro-acoustic transducer element
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Patent number 4,383,194
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Issue date May 10, 1983
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Toray Industries, Inc.
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Hiroji Ohigashi
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B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
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Ultrasonic transducer
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Patent number 4,296,349
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Issue date Oct 20, 1981
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Toray Industries, Inc.
-
Toshiharu Nakanishi
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B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL