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Priority claimed from CH597561Aexternal-prioritypatent/CH449818A/en
Priority claimed from CH1351761Aexternal-prioritypatent/CH448329A/en
Application filed by Ciba GeigyfiledCriticalCiba Geigy
Application grantedgrantedCritical
Publication of AT239395BpublicationCriticalpatent/AT239395B/en