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Key switch
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Patent number 6,759,613
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Issue date Jul 6, 2004
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NEC Corporation
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Akio Kurihara
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H01 - BASIC ELECTRIC ELEMENTS
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Key switch
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Patent number 6,133,539
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Issue date Oct 17, 2000
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Hon Hai Precision Ind. Co., Ltd.
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Huan-Ming Yao
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H01 - BASIC ELECTRIC ELEMENTS
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Keyswitch key apparatus
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Patent number 5,986,227
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Issue date Nov 16, 1999
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Hon Hai Precision Ind. Co., Ltd.
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Ming-Yow Hon
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H01 - BASIC ELECTRIC ELEMENTS
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Key switch assembly
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Patent number 4,845,319
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Issue date Jul 4, 1989
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KB Denver, Inc.
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Richard R. Watkins
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H01 - BASIC ELECTRIC ELEMENTS
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Key switch assembly
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Patent number 4,778,952
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Issue date Oct 18, 1988
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Eaton Corporation
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Richard R. Watkins
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H01 - BASIC ELECTRIC ELEMENTS
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Coil spring for key switch
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Patent number 4,733,036
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Issue date Mar 22, 1988
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Omron Tateisi Electronics Co.
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Haruyuki Koizumi
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H01 - BASIC ELECTRIC ELEMENTS
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Key switch
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Patent number 4,659,879
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Issue date Apr 21, 1987
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Topre Corporation
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Hiroshi Hasegawa
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H01 - BASIC ELECTRIC ELEMENTS
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Pushbutton switch assembly
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Patent number 4,286,131
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Issue date Aug 25, 1981
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Motorola, Inc.
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Stephen P. Kopish
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H01 - BASIC ELECTRIC ELEMENTS
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3797630
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Patent number 3,797,630
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Issue date Mar 19, 1974
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS