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.)
Expired
Application number
CA746151A
Inventor
G. Parker Frederick
C. Broughton David
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.)
Marconis Wireless Telegraph Co Ltd
STC PLC
Original Assignee
Marconis Wireless Telegraph Co Ltd
Standard Telephone and Cables PLC
Publication date
Application grantedgrantedCritical
Publication of CA746151ApublicationCriticalpatent/CA746151A/en