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Portable terminal device
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Patent number 6,055,440
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Issue date Apr 25, 2000
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NEC Corporation
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Matai Masahiro
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Data display radio pager
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Patent number 5,548,271
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Issue date Aug 20, 1996
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NEC Corporation
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Kinya Tsuchiyama
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G08 - SIGNALLING
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Dual plate antenna
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Patent number 5,079,559
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Issue date Jan 7, 1992
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NEC Corporation
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Shinjiro Umetsu
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H01 - BASIC ELECTRIC ELEMENTS
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Paging receiver
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Patent number 4,786,901
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Issue date Nov 22, 1988
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NEC Corporation
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Masahiro Matai
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G08 - SIGNALLING
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