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Priority claimed from NL8000398Aexternal-prioritypatent/NL8000398A/en
Application filed by Pelt & HooykaasfiledCriticalPelt & Hooykaas
Priority claimed from EP81200067Aexternal-prioritypatent/EP0032778B1/en
Application grantedgrantedCritical
Publication of ATE20111T1publicationCriticalpatent/ATE20111T1/en