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Application filed by Erkki Paeivioe Leppaekumpu, Markku PiironenfiledCriticalErkki Paeivioe Leppaekumpu
Priority to FI811494ApriorityCriticalpatent/FI63157C/en
Publication of FI811494LpublicationCriticalpatent/FI811494L/en
Application grantedgrantedCritical
Publication of FI63157BpublicationCriticalpatent/FI63157B/en
Publication of FI63157CpublicationCriticalpatent/FI63157C/en