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 Martin Marietta CorpfiledCriticalMartin Marietta Corp
Priority claimed from PCT/US1988/002486external-prioritypatent/WO1989001531A1/en
Application grantedgrantedCritical
Publication of ATE95843T1publicationCriticalpatent/ATE95843T1/de