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 DE19702025632external-prioritypatent/DE2025632C3/en
Priority claimed from DE2126881Aexternal-prioritypatent/DE2126881C3/en
Application filed by Knapsack AgfiledCriticalKnapsack Ag
Application grantedgrantedCritical
Publication of AT316503BpublicationCriticalpatent/AT316503B/en