Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Klaas ZwartfiledCriticalKlaas Zwart
Priority claimed from EP19810903105external-prioritypatent/EP0063596B1/de
Application grantedgrantedCritical
Publication of ATE12811T1publicationCriticalpatent/ATE12811T1/de