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Illuminated switch apparatus
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Patent number 5,252,798
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Issue date Oct 12, 1993
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Alps Electric Co., Ltd.
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Soetsu Kamada
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H01 - BASIC ELECTRIC ELEMENTS
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Push switch
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Patent number 4,795,860
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Issue date Jan 3, 1989
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Alps Electric Co., Ltd.
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Soetsu Kamada
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H01 - BASIC ELECTRIC ELEMENTS
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Push button indicating device
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Patent number 4,771,725
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Issue date Sep 20, 1988
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Alps Electric Co., Ltd.
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Hiroyuki Miyaguchi
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H01 - BASIC ELECTRIC ELEMENTS