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Repeater system
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Patent number 5,289,306
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Issue date Feb 22, 1994
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Victor Company of Japan
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Kazutoshi Hirohashi
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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IC card input and output terminal
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Patent number D332943
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Issue date Feb 2, 1993
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Oki Electric Industry Co., Ltd.
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Norimi Koiwa
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D14 - Recording, communication, or information retrieval equipment
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Totally self-checking checker
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Patent number 5,179,561
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Issue date Jan 12, 1993
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NTT Data Communications Systems Corporation
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Nobuyoshi Izawa
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G06 - COMPUTING CALCULATING COUNTING
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