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Ink composition
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Patent number 5,421,868
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Issue date Jun 6, 1995
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International Business Machines Corporation
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Juan Ayalia-Esquilin
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Ink composition for drop-on-demand ink jet
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Patent number 4,781,758
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Issue date Nov 1, 1988
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International Business Machines Corporation
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Paul L. Gendler
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Electrochromic printing
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Patent number 4,444,626
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Issue date Apr 24, 1984
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International Business Machines Corporation
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William E. Bernier
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Printing medium and use thereof
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Patent number 4,443,302
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Issue date Apr 17, 1984
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International Business Machines Corporation
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Paul L. Gendler
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Electrochromic recording paper
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Patent number 4,309,255
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Issue date Jan 5, 1982
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International Business Machines Corporation
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Paul L. Gendler
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS