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 DE3644834Aexternal-prioritypatent/DE3644834C1/en
Application filed by Vogelsang Ernst Gmbh Co KgfiledCriticalVogelsang Ernst Gmbh Co Kg
Application grantedgrantedCritical
Publication of ATE69867T1publicationCriticalpatent/ATE69867T1/en