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Mobile communication system
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Patent number 5,875,183
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Issue date Feb 23, 1999
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Oki Electric Industry Co., Ltd.
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Kazuhiko Nitadori
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G08 - SIGNALLING
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Ultrasonic imaging system
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Patent number 4,237,737
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Issue date Dec 9, 1980
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Oki Electric Industry Co. Ltd.
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Kazuhiko Nitadori
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Digital scan converter
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Patent number 4,220,969
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Issue date Sep 2, 1980
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Oki Electric Industry Co., Ltd.
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Kazuhiko Nitadori
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G01 - MEASURING TESTING