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http://www.google.com/patents/US3486192?utm_source=gb-gplus-share
Patent US3486192 - APPARATUS FOR EXTRUSION OF THERMOPLASTICS
APPARATUS FOR EXTRUSION OF THERMOPLASTICS
Gene Le Roy et al
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Abstract
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Description
Claims
Patent number
: 3486192
Filing date
: Mar 24, 1967
Issue date
: Dec 30, 1969
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