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Application filed by Kalevi Pietikaeinen, Kari HaenninenfiledCriticalKalevi Pietikaeinen
Priority to FI981116ApriorityCriticalpatent/FI981116A/en
Publication of FI981116A0publicationCriticalpatent/FI981116A0/en
Publication of FI981116ApublicationCriticalpatent/FI981116A/en