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Application filed by Martti Kalervo PorkkafiledCriticalMartti Kalervo Porkka
Priority to FI971796ApriorityCriticalpatent/FI971796A/sv
Publication of FI971796A0publicationCriticalpatent/FI971796A0/sv
Publication of FI971796ApublicationCriticalpatent/FI971796A/sv