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 US06/246,362external-prioritypatent/US4366849A/en
Priority claimed from US06/246,363external-prioritypatent/US4366850A/en
Application filed by Burns BrosfiledCriticalBurns Bros
Priority claimed from EP85200453Aexternal-prioritypatent/EP0159073B1/en
Application grantedgrantedCritical
Publication of ATE49379T1publicationCriticalpatent/ATE49379T1/en