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Publication date
Priority claimed from CH831271Aexternal-prioritypatent/CH551930A/en
Priority claimed from CH1123171Aexternal-prioritypatent/CH563946A5/xx
Application filed by Kaelin J RfiledCriticalKaelin J R
Application grantedgrantedCritical
Publication of AT320554BpublicationCriticalpatent/AT320554B/en