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Variable scale rotary switch
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Patent number 5,351,161
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Issue date Sep 27, 1994
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Sony Electronics, Inc.
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Michael T. MacKay
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G05 - CONTROLLING REGULATING
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Variable scale input device
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Patent number 5,191,320
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Issue date Mar 2, 1993
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Sony Corporation of America
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Michael T. MacKay
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G06 - COMPUTING CALCULATING COUNTING
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Multi-dimensional user interface
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Patent number 5,148,154
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Issue date Sep 15, 1992
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Sony Corporation of America
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Michael T. MacKay
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G06 - COMPUTING CALCULATING COUNTING