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Process for purification of gallium material
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Patent number 5,458,669
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Issue date Oct 17, 1995
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Sumitomo Chemical Company, Limited
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Hideo Maeda
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Process for producing inorganic fiber
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Patent number 4,961,889
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Issue date Oct 9, 1990
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Sumitomo Chemical Company, Limited
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Hidekimi Kadokura
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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Magnetic recording medium
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Patent number 4,671,993
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Issue date Jun 9, 1987
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Sumitomo Chemical Company, Limited
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Hidekimi Kadokura
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G11 - INFORMATION STORAGE
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Process for producing inorganic fiber
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Patent number 4,495,121
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Issue date Jan 22, 1985
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Sumitomo Chemical Company, Ltd.
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Shozo Horikiri
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES