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Wilhelm Brand
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Hannover, DT
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last 30 patents
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Patent Grant
Screw extruder for thermoplastics synthetic materials or elastomers
Patent number
4,052,038
Issue date
Oct 4, 1977
Hermann Berstorff Maschinenbau GmbH
Wilhelm Brand
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Patent Grant
Continuously operable apparatus for the preparation and/or processi...
Patent number
4,047,671
Issue date
Sep 13, 1977
Hermann Berstorff Maschinenbau GmbH
Jurgen Bertram
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL