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Priority claimed from DE19792903937external-prioritypatent/DE2903937C2/de
Priority claimed from DE19792928785external-prioritypatent/DE2928785A1/de
Application filed by Ernst M Spengler, Rep Fed Di GermaniafiledCriticalErnst M Spengler
Publication of IT8012432A0publicationCriticalpatent/IT8012432A0/it