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Priority claimed from DE2604736Aexternal-prioritypatent/DE2604736C3/de
Priority claimed from DE2621186Aexternal-prioritypatent/DE2621186C3/de
Application filed by Gartner & Co JfiledCriticalGartner & Co J
Publication of ATA73177ApublicationCriticalpatent/ATA73177A/de
Application grantedgrantedCritical
Publication of AT382229BpublicationCriticalpatent/AT382229B/de