Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 US812918Aexternal-prioritypatent/US2991422A/en
Priority claimed from US812855Aexternal-prioritypatent/US3050587A/en
Application filed by Western Electric Co IncfiledCriticalWestern Electric Co Inc
Priority to FR827168ApriorityCriticalpatent/FR1257364A/en
Application grantedgrantedCritical
Publication of FR1257364ApublicationCriticalpatent/FR1257364A/en