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Priority claimed from CA000518201Aexternal-prioritypatent/CA1280896C/en
Priority claimed from CA000542562Aexternal-prioritypatent/CA1317465C/en
Application filed by Diabrasive International LimitfiledCriticalDiabrasive International Limit
Priority claimed from EP87810529Aexternal-prioritypatent/EP0263785B1/de
Application grantedgrantedCritical
Publication of ATE61268T1publicationCriticalpatent/ATE61268T1/de