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 US381979Aexternal-prioritypatent/US3874613A/en
Application filed by Zollinger OfiledCriticalZollinger O
Publication of TR17890ApublicationCriticalpatent/TR17890A/tr