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 US06/019,216external-prioritypatent/US4253998A/en
Priority claimed from GB7913871Aexternal-prioritypatent/GB2019411B/en
Application filed by American Home ProdfiledCriticalAmerican Home Prod
Publication of IE790812LpublicationCriticalpatent/IE790812L/en
Publication of IE48500B1publicationCriticalpatent/IE48500B1/en