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
Application filed by Western Electric Co, John George FraynefiledCriticalWestern Electric Co
Priority to IE24947ApriorityCriticalpatent/IE18210L/en
Publication of IE18210LpublicationCriticalpatent/IE18210L/en