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Electroluminescent display device
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Patent number 4,814,668
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Issue date Mar 21, 1989
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Matsushita Electric Industrial Co., Ltd.
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Takao Tohda
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Thin film EL panel
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Patent number 4,668,582
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Issue date May 26, 1987
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Matsushita Electric Industrial Co., Ltd.
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Tomizo Matsuoka
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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Electroluminescent display device
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Patent number 4,634,934
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Issue date Jan 6, 1987
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Matsushita Electric Industrial Co. Ltd.
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Takao Tohda
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Ceramic luminescent device
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Patent number 4,386,295
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Issue date May 31, 1983
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Matsushita Electric Industrial Co., Ltd.
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Yosuke Fujita
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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