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Magnetooptical recording medium
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Patent number 5,738,950
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Issue date Apr 14, 1998
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Canon Kabushiki Kaisha
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Hiroyoshi Kishi
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Magnetooptical recording medium
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Patent number 4,693,943
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Issue date Sep 15, 1987
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Canon Kabushiki Kaisha
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Hiroyoshi Kishi
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Magnetooptic memory medium
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Patent number 4,467,383
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Issue date Aug 21, 1984
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Sharp Kabushiki Kaisha
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Kenji Ohta
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Thermomagnetic record carrier
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Patent number 4,310,899
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Issue date Jan 12, 1982
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U.S. Philips Corporation
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Johannes W. M. Biesterbos
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Magneto-optical memory medium
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Patent number 4,152,486
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Issue date May 1, 1979
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Kokusai Denshin Denwa Kabushiki Kaisha
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Nobutake Imamura
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...