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
Priority claimed from DE3420570Aexternal-prioritypatent/DE3420570C1/de
Application filed by Sgf Gmbh & Co KgfiledCriticalSgf Gmbh & Co Kg
Application grantedgrantedCritical
Publication of ATE31969T1publicationCriticalpatent/ATE31969T1/de