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Film blowhead for producing tubular film
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Patent number 4,019,843
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Issue date Apr 26, 1977
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Windmoller & Holscher
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Werner Josef Zimmermann
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Blowhead for tubular film
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Patent number 3,966,377
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Issue date Jun 29, 1976
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Windmoller & Holscher
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Hartmut Upmeier
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Blow-head for tubular film
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Patent number 3,930,768
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Issue date Jan 6, 1976
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Windmoller & Holscher
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Werner Josef Zimmermann
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL