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Magnetic disk-jacket assembly
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Patent number 4,263,634
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Issue date Apr 21, 1981
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International Business Machines Corporation
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Roger D. Chenoweth
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G11 - INFORMATION STORAGE
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3770908
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Patent number 3,770,908
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Issue date Nov 6, 1973
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G11 - INFORMATION STORAGE
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3770907
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Patent number 3,770,907
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Issue date Nov 6, 1973
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G11 - INFORMATION STORAGE
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3588123
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Patent number 3,588,123
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Issue date Jun 28, 1971
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G11 - INFORMATION STORAGE
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3355177
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Patent number 3,355,177
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Issue date Nov 28, 1967
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G11 - INFORMATION STORAGE