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Halogen-free epoxy resin
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Patent number 6,160,077
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Issue date Dec 12, 2000
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Siemens Aktiengesellschaft
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Flame retardant reaction resin system
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Patent number 5,837,771
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Issue date Nov 17, 1998
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Lemens Aktiengesellschaft
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Ernst Wipfelder
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Apparatus for manufacturing an otoplastic
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Patent number 5,006,055
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Issue date Apr 9, 1991
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Siemens Aktiengesellschaft
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Helmut LeBisch
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Method for manufacturing an otoplastic
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Patent number 4,871,502
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Issue date Oct 3, 1989
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Siemens Aktiengesellschaft
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Helmut LeBisch
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL