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Heated die lips system
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Patent number 6,065,953
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Issue date May 23, 2000
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Alfredo Bentivoglio
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Lip heater for plastic extrusion die
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Patent number 4,842,504
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Issue date Jun 27, 1989
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Polysystem Machinery Mfg. Inc.
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Alfredo Bentivoglio
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Die-lip heater
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Patent number 4,830,595
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Issue date May 16, 1989
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Polysystem Machinery Mfg. Inc.
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Alfredo Bentivoglio
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL