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Helmut Halker
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Niederzier, DE
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last 30 patents
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Patent Grant
Strip of material and its manufacturing method
Patent number
4,948,658
Issue date
Aug 14, 1990
Thomas Josef Heimbach GmbH & Co.
Helmut Halker
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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Patent Grant
Machine felt, and a method for manufacturing same
Patent number
4,761,329
Issue date
Aug 2, 1988
Thomas Josef Heimbach GmbH & Co.
Vera Halker
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE