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Application filed by Teemu Tapani Tirkkonen, Veijo Paavo Juhani TirkkonenfiledCriticalTeemu Tapani Tirkkonen
Priority to FI890400ApriorityCriticalpatent/FI87719C/en
Publication of FI890400A0publicationCriticalpatent/FI890400A0/en
Publication of FI890400ApublicationCriticalpatent/FI890400A/en
Publication of FI87719BpublicationCriticalpatent/FI87719B/en
Application grantedgrantedCritical
Publication of FI87719CpublicationCriticalpatent/FI87719C/en