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Packaging substrate
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Patent number 6,239,981
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Issue date May 29, 2001
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Mitsubishi Denki Kabushiki Kaisha
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Tetsuro Washida
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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Semiconductor device
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Patent number 6,144,091
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Issue date Nov 7, 2000
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Mitsubishi Denki Kabushiki Kaisha
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Tetsuro Washida
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H01 - BASIC ELECTRIC ELEMENTS
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IC card
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Patent number 5,886,874
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Issue date Mar 23, 1999
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Mitsubishi Denki Kabushiki Kaisha
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Shigeo Onoda
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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IC card
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Patent number 5,719,746
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Issue date Feb 17, 1998
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Mitsubishi Denki Kabushiki Kaisha
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Jun Ohbuchi
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G06 - COMPUTING CALCULATING COUNTING
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