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 GB868601646Aexternal-prioritypatent/GB8601646D0/en
Application filed by Robert Stephen DavidsonfiledCriticalRobert Stephen Davidson
Application grantedgrantedCritical
Publication of ATE74664T1publicationCriticalpatent/ATE74664T1/de