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Magnetic fluid
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Patent number 4,758,275
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Issue date Jul 19, 1988
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Matsushita Electric Industrial Co., Ltd.
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Keiichi Yubakami
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H01 - BASIC ELECTRIC ELEMENTS
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Magnetic fluid
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Patent number 4,519,931
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Issue date May 28, 1985
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Matsushita Electric Industrial Co., Ltd.
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Mamoru Soga
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B82 - NANO-TECHNOLOGY
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Image forming particles
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Patent number 4,472,490
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Issue date Sep 18, 1984
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Matsushita Electric Industrial Co., Ltd.
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Keiichi Yubakami
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Image forming process
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Patent number 4,456,669
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Issue date Jun 26, 1984
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Matsushita Electric Industrial Co., Ltd.
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Keiichi Yubakami
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY