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Ink jet array
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Patent number 4,891,654
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Issue date Jan 2, 1990
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Spectra, Inc.
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Paul A. Hoisington
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Dual mode ink jet printer
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Patent number 4,864,328
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Issue date Sep 5, 1989
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Spectra, Inc.
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Kenneth H. Fischbeck
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Ink jet array
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Patent number 4,835,554
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Issue date May 30, 1989
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Spectra, Inc.
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Paul A. Hoisington
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Catadioptric projection lantern
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Patent number 4,775,232
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Issue date Oct 4, 1988
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Spectra, Inc.
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Kenneth H. Fischbeck
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY