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 US06/505,326external-prioritypatent/US4622219A/en
Application filed by Duncan Harold HaynesfiledCriticalDuncan Harold Haynes
Application grantedgrantedCritical
Publication of ATE60708T1publicationCriticalpatent/ATE60708T1/de