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
CA597215A
Inventor
G. A. Cressell Ian
F. Madigan Michael
E. Copsey William
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.)
CMC Electronics Inc
Original Assignee
Ian G A Cressell
Michael F Madigan
William E Copsey
Canadian Marconi Co
Publication date
Application grantedgrantedCritical
Publication of CA597215ApublicationCriticalpatent/CA597215A/en