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Printer architecture structure
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Patent number 5,413,427
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Issue date May 9, 1995
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Hewlett-Packard Company
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Robert R. Giles
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Airflow system for ink-jet printer
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Patent number 5,406,316
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Issue date Apr 11, 1995
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Hewlett-Packard Company
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William H. Schwiebert
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Bi-directional pen changer
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Patent number 4,417,258
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Issue date Nov 22, 1983
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Hewlett-Packard Company
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David C. Tribolet
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Plotter with automatic pen-changer
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Patent number 4,135,245
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Issue date Jan 16, 1979
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Hewlett-Packard Company
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Richard M. Kemplin
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES