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Field emission element
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Patent number 5,793,154
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Issue date Aug 11, 1998
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Futaba Denshi Kogyo K.K.
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Shigeo Itoh
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H01 - BASIC ELECTRIC ELEMENTS
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Field emission cathode
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Patent number 5,612,587
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Issue date Mar 18, 1997
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Futaba Denshi Kogyo K.K.
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Shigeo Itoh
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H01 - BASIC ELECTRIC ELEMENTS
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Field emission type display device
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Patent number 5,589,738
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Issue date Dec 31, 1996
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Futaba Denshi Kogyo Kabushiki Kaisha
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Koji Onodaka
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Field emission element
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Patent number 5,469,014
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Issue date Nov 21, 1995
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Shigeo Itoh
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H01 - BASIC ELECTRIC ELEMENTS
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Image display device
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Patent number 5,256,936
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Issue date Oct 26, 1993
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Futaba Denshi Kogyo K.K.
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Shigeo Itoh
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H01 - BASIC ELECTRIC ELEMENTS
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Electron emitting element
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Patent number 5,189,341
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Issue date Feb 23, 1993
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Futaba Denshi Kogyo Kabushiki Kaisha
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Shigeo Itoh
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H01 - BASIC ELECTRIC ELEMENTS
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Fluorescent display device
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Patent number 4,835,445
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Issue date May 30, 1989
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Futaba Denshi Kogho K.K.
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Teruo Watanabe
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H01 - BASIC ELECTRIC ELEMENTS