Legal status (The legal status 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 status listed.)
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 GB30525/74Aexternal-prioritypatent/GB1507144A/en
Application filed by British Telecommunications PLCfiledCriticalBritish Telecommunications PLC
Application grantedgrantedCritical
Publication of AU494943B2publicationCriticalpatent/AU494943B2/en
Publication of AU8262775ApublicationCriticalpatent/AU8262775A/en