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Priority claimed from US05/536,888external-prioritypatent/US3964872A/en
Application filed by Hannu Henrik KarinkantafiledCriticalHannu Henrik Karinkanta
Publication of FI751882ApublicationCriticalpatent/FI751882A/fi
Publication of FI52407BpublicationCriticalpatent/FI52407B/fi
Application grantedgrantedCritical
Publication of FI52407CpublicationCriticalpatent/FI52407C/fi