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Coal tar impregnated reinforcement sheets
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Patent number 6,127,292
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Issue date Oct 3, 2000
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W.P. Hickman Systems Inc.
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Kenneth J. Brzozowski
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Built-up roofing systems and methods
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Patent number 6,110,846
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Issue date Aug 29, 2000
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W.P. Hickman Systems Inc.
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Kenneth J. Brzozowski
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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2930726
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Patent number 2,930,726
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Issue date Mar 29, 1960
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B32 - LAYERED PRODUCTS
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2101874
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Patent number 2,101,874
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Issue date Dec 14, 1937
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D03 - WEAVING
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2035122
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Patent number 2,035,122
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Issue date Mar 24, 1936
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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1448386
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Patent number 1,448,386
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Issue date Mar 13, 1923
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H01 - BASIC ELECTRIC ELEMENTS
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1044558
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Patent number 1,044,558
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Issue date Nov 19, 1912
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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429885
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Patent number 429,885
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Issue date Jun 10, 1890
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...