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 US06/355,638external-prioritypatent/US4431644A/en
Application filed by Elizabeth M Smith, Joseph T Witkowski, Ronald J DollfiledCriticalElizabeth M Smith
Publication of PH25121ApublicationCriticalpatent/PH25121A/en