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Priority claimed from DE3837869Aexternal-prioritypatent/DE3837869C1/de
Priority claimed from DE3921711Aexternal-prioritypatent/DE3921711C1/de
Application filed by Pfaff Ag G MfiledCriticalPfaff Ag G M
Application grantedgrantedCritical
Publication of ATE87857T1publicationCriticalpatent/ATE87857T1/de