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Polyester-amide resin
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Patent number 4,390,686
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Issue date Jun 28, 1983
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Dr. Beck & Co. AG
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Harald Janssen
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H01 - BASIC ELECTRIC ELEMENTS
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Polyester imide resins
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Patent number 4,145,334
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Issue date Mar 20, 1979
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Dr. Beck & Co., AG
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Karl Schmidt
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Diimidodicarboxylic acids
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Patent number 4,145,351
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Issue date Mar 20, 1979
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Dr. Beck & Co. AG
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Karl Schmidt
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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