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Priority claimed from GB7928416Aexternal-prioritypatent/GB2036541B/en
Priority claimed from GB8018507Aexternal-prioritypatent/GB2056777B/en
Application filed by D.H. Haden LimitedfiledCriticalD.H. Haden Limited
Priority claimed from EP80302516Aexternal-prioritypatent/EP0024130B1/de
Application grantedgrantedCritical
Publication of ATE5848T1publicationCriticalpatent/ATE5848T1/de