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Priority to FI895772ApriorityCriticalpatent/FI86623C/en
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Publication of FI895772ApublicationCriticalpatent/FI895772A/en
Publication of FI86623BpublicationCriticalpatent/FI86623B/en
Application grantedgrantedCritical
Publication of FI86623CpublicationCriticalpatent/FI86623C/en