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
CA705167A
Inventor
E. Jessen Howard
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.)
CECO STEEL PRODUCTS CORP
Original Assignee
CECO STEEL PRODUCTS CORP
Publication date
Application grantedgrantedCritical
Publication of CA705167ApublicationCriticalpatent/CA705167A/en