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Plastic extrusion and apparatus
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Patent number 4,118,163
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Issue date Oct 3, 1978
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Owens-Illinois, Inc.
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Soo-Il Lee
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Injection molding method and apparatus
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Patent number 4,108,956
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Issue date Aug 22, 1978
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Owens-Illinois, Inc.
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Soo-Il Lee
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL