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 US06/385,540external-prioritypatent/US4455898A/en
Application filed by Edgar F Marbourg JrfiledCriticalEdgar F Marbourg Jr
Application grantedgrantedCritical
Publication of ATE29417T1publicationCriticalpatent/ATE29417T1/en