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Thin key sheet
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Patent number 7,705,256
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Issue date Apr 27, 2010
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Sunarrow Limited
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Yoshio Kenmochi
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H01 - BASIC ELECTRIC ELEMENTS
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Pushbutton switch
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Patent number 5,664,667
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Issue date Sep 9, 1997
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Sunarrow Co., Ltd.
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Yoshio Kenmochi
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H01 - BASIC ELECTRIC ELEMENTS
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Pushbutton switch
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Patent number 5,661,279
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Issue date Aug 26, 1997
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Sunarrow Co., Ltd.
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Yoshio Kenmochi
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H01 - BASIC ELECTRIC ELEMENTS
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Illuminated button key
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Patent number 5,234,744
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Issue date Aug 10, 1993
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Sunarrow Co., Ltd.
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Yoshio Kenmochi
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Uniform illumination plate
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Patent number 5,128,842
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Issue date Jul 7, 1992
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Sunarrow Co., Inc.
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Yoshio Kenmochi
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS