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Destructible core for undercut casting
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Patent number 5,310,159
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Issue date May 10, 1994
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Societe Nationale des Poudres et Explosifs
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Andre Hiss
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Apparatus for extruding plastic materials
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Patent number 4,995,802
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Issue date Feb 26, 1991
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Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
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Dietmar Muller
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Mold core including ejection sleeve
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Patent number 4,660,801
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Issue date Apr 28, 1987
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Husky Injection Molding Systems Ltd.
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Robert D. Schad
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3674386
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Issue date Jul 4, 1972
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3664801
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Patent number 3,664,801
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Issue date May 23, 1972
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F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL