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Priority claimed from DE3529801Aexternal-prioritypatent/DE3529801C1/en
Priority claimed from DE3544157Aexternal-prioritypatent/DE3544157C1/en
Application filed by Biso Bitter Gmbh & Co KgfiledCriticalBiso Bitter Gmbh & Co Kg
Application grantedgrantedCritical
Publication of ATE51996T1publicationCriticalpatent/ATE51996T1/en