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Priority claimed from GB838323404Aexternal-prioritypatent/GB8323404D0/en
Application filed by Kenneth Harold Acketts, Ronald Lionel AckettsfiledCriticalKenneth Harold Acketts
Priority claimed from EP19840305093external-prioritypatent/EP0136003B1/de
Application grantedgrantedCritical
Publication of ATE52303T1publicationCriticalpatent/ATE52303T1/de