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
CA778081A
Inventor
L. W. Watt Arthur
W. Gray Harold
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.)
HUGHES-OWENS Co (LIMITED)
Original Assignee
HUGHES-OWENS Co (LIMITED)
Publication date
Application grantedgrantedCritical
Publication of CA778081ApublicationCriticalpatent/CA778081A/en