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Priority claimed from GB888822894Aexternal-prioritypatent/GB8822894D0/en
Priority claimed from GB898901157Aexternal-prioritypatent/GB8901157D0/en
Application filed by Mangar Aids LtdfiledCriticalMangar Aids Ltd
Priority claimed from EP89309571Aexternal-prioritypatent/EP0361774B1/de
Application grantedgrantedCritical
Publication of ATE83914T1publicationCriticalpatent/ATE83914T1/de