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 US06/675,536external-prioritypatent/US4627272A/en
Application filed by Cambridge Applied Systems IncfiledCriticalCambridge Applied Systems Inc
Application grantedgrantedCritical
Publication of ATE60949T1publicationCriticalpatent/ATE60949T1/en