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
CA905009A
Inventor
David A. Vincent
Raye E. Thomas
Original Assignee
Northern Electric Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA905009ApublicationCriticalpatent/CA905009A/en