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Priority claimed from DE8706551Uexternal-prioritypatent/DE8706551U1/en
Priority claimed from DE8708506Uexternal-prioritypatent/DE8708506U1/en
Application filed by Niemann Hans DieterfiledCriticalNiemann Hans Dieter
Priority claimed from EP88106976Aexternal-prioritypatent/EP0296337B1/en
Application grantedgrantedCritical
Publication of ATE64170T1publicationCriticalpatent/ATE64170T1/en