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Compact key structure
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Patent number 6,222,527
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Issue date Apr 24, 2001
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Silitek Corporation
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Gino Hu
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H01 - BASIC ELECTRIC ELEMENTS
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Contact switch device
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Patent number 5,350,890
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Issue date Sep 27, 1994
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Gould Instrument Systems, Inc.
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Brian Fairbrother
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H01 - BASIC ELECTRIC ELEMENTS
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Data entry keyboard
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Patent number 4,701,579
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Issue date Oct 20, 1987
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Brother Kogyo Kabushiki Kaisha
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Hisao Kurachi
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H01 - BASIC ELECTRIC ELEMENTS
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