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 US06/177,039external-prioritypatent/US4386848A/en
Application filed by Martin Marietta CorpfiledCriticalMartin Marietta Corp
Publication of NO821188LpublicationCriticalpatent/NO821188L/en
Publication of NO156104BpublicationCriticalpatent/NO156104B/en
Publication of NO156104CpublicationCriticalpatent/NO156104C/en