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Patents Grantslast 30 patents

Information Patent Grant
Method of operating a screw extruder and screw extruders for carryi...
- Patent number 4,804,505
- Issue date Feb 14, 1989
- Werner & Pfeiderer GmbH
- Wilfried Venzke
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL