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Priority claimed from DE19691943664external-prioritypatent/DE1943664A1/de
Priority claimed from DE19691951073external-prioritypatent/DE1951073A1/de
Application filed by Leistritz Hans KarlfiledCriticalLeistritz Hans Karl
Application grantedgrantedCritical
Publication of AT308946BpublicationCriticalpatent/AT308946B/de