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 US628906Aexternal-prioritypatent/US2946025A/en
Application filed by Western Electric CofiledCriticalWestern Electric Co
Application grantedgrantedCritical
Publication of BE595225QpublicationCriticalpatent/BE595225Q/en