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Pager
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Patent number 4,734,694
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Issue date Mar 29, 1988
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NEC Corporation
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Shinjiro Umetsu
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G08 - SIGNALLING
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Radio paging receiver
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Patent number 4,653,028
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Issue date Mar 24, 1987
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NEC Corporation
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Koichi Nagata
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G06 - COMPUTING CALCULATING COUNTING
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Limiter amplifier
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Patent number 4,495,429
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Issue date Jan 22, 1985
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Nippon Electric Co., Ltd.
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Takashi Oda
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H03 - BASIC ELECTRONIC CIRCUITRY
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Tone signal detecting circuit
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Patent number 4,127,846
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Issue date Nov 28, 1978
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Nippon Electric Co., Ltd.
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Toshihiro Mori
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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