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Priority claimed from DE1904830Aexternal-prioritypatent/DE1904830C3/de
Priority claimed from DE19691905164external-prioritypatent/DE1905164C3/de
Application filed by Fahr Ag MaschffiledCriticalFahr Ag Maschf
Application grantedgrantedCritical
Publication of AT308448BpublicationCriticalpatent/AT308448B/de