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Bar band intersectional matrix printer
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Patent number 4,540,296
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Issue date Sep 10, 1985
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International Business Machines Corporation
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William D. Thorne
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Band and hammer dot matrix printer
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Patent number 4,428,284
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Issue date Jan 31, 1984
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International Business Machines Corp.
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William D. Thorne
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Segmented drum bar helix printer
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Patent number 4,273,040
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Issue date Jun 16, 1981
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International Business Machines Corporation
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Robert A. Sebrosky
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Ribbon cartridge
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Patent number 3,941,231
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Issue date Mar 2, 1976
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International Business Machines Corporation
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George Coleman Matuck
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS