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
CA605023A
Inventor
E. Brougham Leslie
Brown Roland
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.)
Block and Anderson Ltd
Original Assignee
Block and Anderson Ltd
Publication date
Application grantedgrantedCritical
Publication of CA605023ApublicationCriticalpatent/CA605023A/en