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 DE3447468Aexternal-prioritypatent/DE3447468C2/en
Application filed by Egon PellatzfiledCriticalEgon Pellatz
Application grantedgrantedCritical
Publication of ATE55679T1publicationCriticalpatent/ATE55679T1/en