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 US61205Aexternal-prioritypatent/US3055257A/en
Application filed by Western Electric CofiledCriticalWestern Electric Co
Publication of BE608938ApublicationCriticalpatent/BE608938A/fr