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 US06/760,716external-prioritypatent/US4822060A/en
Application filed by Bentley Harris Mfg CofiledCriticalBentley Harris Mfg Co
Application grantedgrantedCritical
Publication of ATE46018T1publicationCriticalpatent/ATE46018T1/en