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Priority to FI840023ApriorityCriticalpatent/FI74201C/en
Publication of FI840023A0publicationCriticalpatent/FI840023A0/en
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Application grantedgrantedCritical
Publication of FI74201BpublicationCriticalpatent/FI74201B/en
Publication of FI74201CpublicationCriticalpatent/FI74201C/en