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Hot melt ink supply unit
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Patent number 5,172,135
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Issue date Dec 15, 1992
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Spectra, Inc.
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Linda T. Creagh
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Document scanning system
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Patent number RE33783
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Issue date Dec 31, 1991
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Intergraph Corporation
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Charles W. Spehrley
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358 - Facsimile and static presentation processing
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Holt melt ink supply unit
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Patent number 5,003,322
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Issue date Mar 26, 1991
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Spectra, Inc.
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Linda T. Creagh
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Document scanning system
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Patent number 4,686,581
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Issue date Aug 11, 1987
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ANA Tech Corporation
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Charles W. Spehrley
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H04 - ELECTRIC COMMUNICATION TECHNIQUE