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Priority claimed from CH585878Aexternal-prioritypatent/CH631252A5/en
Application filed by Werner SturmfiledCriticalWerner Sturm
Publication of ATA900279ApublicationCriticalpatent/ATA900279A/en
Application grantedgrantedCritical
Publication of AT368939BpublicationCriticalpatent/AT368939B/en