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Priority claimed from FI812930Aexternal-prioritypatent/FI63148C/fi
Priority claimed from FI820095Aexternal-prioritypatent/FI63147C/fi
Priority claimed from FI820094Aexternal-prioritypatent/FI63146C/fi
Application filed by Helvar OyfiledCriticalHelvar Oy
Priority claimed from EP82108212Aexternal-prioritypatent/EP0075176B1/de
Application grantedgrantedCritical
Publication of ATE29100T1publicationCriticalpatent/ATE29100T1/de