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 GB838322576Aexternal-prioritypatent/GB8322576D0/en
Priority claimed from GB838323616Aexternal-prioritypatent/GB8323616D0/en
Application filed by Warwick Ian CollinsfiledCriticalWarwick Ian Collins
Priority claimed from EP84903180Aexternal-prioritypatent/EP0152461B1/de
Application grantedgrantedCritical
Publication of ATE23498T1publicationCriticalpatent/ATE23498T1/de