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Rigid magnetic recording media
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Patent number 4,596,739
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Issue date Jun 24, 1986
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International Business Machines Corporation
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Douglas H. Piltingsrud
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Hydrated alumina binder system
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Patent number 4,567,096
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Issue date Jan 28, 1986
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Douglas H. Piltingsrud
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Fixed abrasive polishing media
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Patent number 4,466,218
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Issue date Aug 21, 1984
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International Business Machines Corporation
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John C. Ottman
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B24 - GRINDING POLISHING
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Fixed abrasive grinding media
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Patent number 4,459,779
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Issue date Jul 17, 1984
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International Business Machines Corporation
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John C. S. Shen
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B24 - GRINDING POLISHING
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