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Ehime, JP
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last 30 patents
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Patent Grant
Non-stationary antenna with sleeve and resonant circuit
Patent number
4,931,807
Issue date
Jun 5, 1990
Nippon Tsushin Densen Company Ltd.
Katsumi Naitou
H01 - BASIC ELECTRIC ELEMENTS
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Patent Grant
Helical antenna for small portable wireless devices
Patent number
4,849,767
Issue date
Jul 18, 1989
Nippon Tsushin Densen Company, Ltd.
Katsumi Naitou
H01 - BASIC ELECTRIC ELEMENTS