Hans-Joachim Schaeffer

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Patents Grantslast 30 patents

Information 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