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Line printer attachment
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Patent number 4,386,359
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Issue date May 31, 1983
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International Business Machines Corporation
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John L. Regehr
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G06 - COMPUTING CALCULATING COUNTING
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Microprocessor system
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Patent number 4,171,536
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Issue date Oct 16, 1979
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International Business Machines Corporation
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Dale A. Heuer
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G06 - COMPUTING CALCULATING COUNTING
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Microprocessor system
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Patent number 4,144,563
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Issue date Mar 13, 1979
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International Business Machines Corporation
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Dale A. Heuer
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G06 - COMPUTING CALCULATING COUNTING
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Interval timer
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Patent number 4,144,447
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Issue date Mar 13, 1979
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International Business Machines Corporation
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Bryce G. Fossum
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G06 - COMPUTING CALCULATING COUNTING
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Microprocessor system
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Patent number 4,093,982
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Issue date Jun 6, 1978
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International Business Machines Corporation
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Dale Arthur Heuer
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G06 - COMPUTING CALCULATING COUNTING
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Memory access control circuit
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Patent number 3,979,727
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Issue date Sep 7, 1976
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International Business Machines Corporation
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Brittain Norman Catron
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G06 - COMPUTING CALCULATING COUNTING