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
Publication date
Priority claimed from GB41598/74Aexternal-prioritypatent/GB1514477A/en
Application filed by British Telecommunications PLCfiledCriticalBritish Telecommunications PLC
Application grantedgrantedCritical
Publication of AU8497075ApublicationCriticalpatent/AU8497075A/en
Publication of AU494130B2publicationCriticalpatent/AU494130B2/en