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 US557054Aexternal-prioritypatent/US2954739A/en
Priority claimed from FR833937Aexternal-prioritypatent/FR1263094A/fr
Application filed by Tait Mfg Co ThefiledCriticalTait Mfg Co The
Publication of BE594301ApublicationCriticalpatent/BE594301A/fr