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Priority claimed from DE19853501912external-prioritypatent/DE3501912C2/de
Priority claimed from DE19863601018external-prioritypatent/DE3601018A1/de
Application filed by Merk Gmbh Telefonbau FriedfiledCriticalMerk Gmbh Telefonbau Fried
Priority claimed from EP86901035Aexternal-prioritypatent/EP0247045B1/de
Application grantedgrantedCritical
Publication of ATE52147T1publicationCriticalpatent/ATE52147T1/de