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Application filed by Sakari KeskinenfiledCriticalSakari Keskinen
Priority to FI851080ApriorityCriticalpatent/FI71538C/en
Publication of FI851080A0publicationCriticalpatent/FI851080A0/en
Priority to SE8502650Aprioritypatent/SE465365B/en
Publication of FI71538BpublicationCriticalpatent/FI71538B/en
Application grantedgrantedCritical
Publication of FI71538CpublicationCriticalpatent/FI71538C/en