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Priority to FI834459ApriorityCriticalpatent/FI72445C/en
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Publication of FI834459ApublicationCriticalpatent/FI834459A/en
Application grantedgrantedCritical
Publication of FI72445BpublicationCriticalpatent/FI72445B/en
Publication of FI72445CpublicationCriticalpatent/FI72445C/en