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Heterogeneous ports switch
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Patent number 5,307,342
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Issue date Apr 26, 1994
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International Business Machines Corporation
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Christos J. Georigiou
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Variable chip-clocking mechanism
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Patent number 5,189,314
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Issue date Feb 23, 1993
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International Business Machines Corporation
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Christos J. Georgiou
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G06 - COMPUTING CALCULATING COUNTING
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Liquid crystal display
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Patent number 4,699,469
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Issue date Oct 13, 1987
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International Business Machines Corporation
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Thor A. Larsen
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Electrochromic matrix display
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Patent number 4,644,344
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Issue date Feb 17, 1987
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International Business Machines Corporation
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Thor A. Larsen
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS