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Application filed by Jaakko Tapani LahtinenfiledCriticalJaakko Tapani Lahtinen
Priority to FI892107ApriorityCriticalpatent/FI81986C/en
Publication of FI892107A0publicationCriticalpatent/FI892107A0/en
Publication of FI81986BpublicationCriticalpatent/FI81986B/en
Application grantedgrantedCritical
Publication of FI81986CpublicationCriticalpatent/FI81986C/en