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Ribbon indicia system
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Patent number 4,797,016
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Issue date Jan 10, 1989
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Creative Associates
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Roy J. Lahr
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Vacuum paper transport system for printer
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Patent number 4,792,249
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Issue date Dec 20, 1988
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Creative Associates Limited Partnership
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Roy J. Lahr
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Printer supplies monitoring system
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Patent number 4,737,645
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Issue date Apr 12, 1988
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Creative Associates Limited Partnership
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Roy J. Lahr
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Consumable credit card
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Patent number 4,104,515
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Issue date Aug 1, 1978
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Xerox Corporation
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David D. Thornburg
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G06 - COMPUTING CALCULATING COUNTING
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Signal processing system
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Patent number 3,952,156
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Issue date Apr 20, 1976
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Xerox Corporation
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Roy J. Lahr
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H04 - ELECTRIC COMMUNICATION TECHNIQUE