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 US06/933,988external-prioritypatent/US4800087A/en
Application filed by Nortec Dev AssfiledCriticalNortec Dev Ass
Application grantedgrantedCritical
Publication of ATE75605T1publicationCriticalpatent/ATE75605T1/de