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
CA746452A
Inventor
B. Rogers Maurice
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.)
Rose Downs and Thompson Ltd
Original Assignee
Maurice B Rogers
Rose Downs and Thompson Ltd
Publication date
Application grantedgrantedCritical
Publication of CA746452ApublicationCriticalpatent/CA746452A/en