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Multi-zone thermal print head
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Patent number 4,520,371
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Issue date May 28, 1985
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International Business Machines Corporation
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Rowland V. D. Firth
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Thermal print head
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Patent number 4,450,342
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Issue date May 22, 1984
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International Business Machines Corporation
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Willie Goff
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Replaceable ribbon cartridge
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Patent number 4,437,779
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Issue date Mar 20, 1984
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International Business Machines Corporation
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Willie Goff
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Variable force sheet feeding mechanism
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Patent number 3,989,237
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Issue date Nov 2, 1976
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International Business Machines Corporation
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Willie Goff
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL