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Priority claimed from DE19742441001external-prioritypatent/DE2441001C3/de
Application filed by Hans FringsfiledCriticalHans Frings
Publication of FI752394A7publicationCriticalpatent/FI752394A7/fi
Publication of FI60444BpublicationCriticalpatent/FI60444B/fi
Application grantedgrantedCritical
Publication of FI60444CpublicationCriticalpatent/FI60444C/fi