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
Application filed by Denys FisherfiledCriticalDenys Fisher
Priority claimed from EP81301083Aexternal-prioritypatent/EP0036732B1/en
Application grantedgrantedCritical
Publication of ATE6755T1publicationCriticalpatent/ATE6755T1/en