Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB8612369Aexternal-prioritypatent/GB2190741B/en
Application filed by Plessey OverseasfiledCriticalPlessey Overseas
Application grantedgrantedCritical
Publication of ATE51390T1publicationCriticalpatent/ATE51390T1/en