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
CA854410A
Inventor
Brown Kenneth
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.)
SQUARE TUBE SYSTEMS Ltd
Original Assignee
SQUARE TUBE SYSTEMS Ltd
Publication date
Application grantedgrantedCritical
Publication of CA854410ApublicationCriticalpatent/CA854410A/en