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Priority to FI851528ApriorityCriticalpatent/FI70963C/en
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Publication of FI70963BpublicationCriticalpatent/FI70963B/en
Publication of FI851528ApublicationCriticalpatent/FI851528A/en
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Publication of FI70963CpublicationCriticalpatent/FI70963C/en