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
CA641569A
Inventor
H. Matthewson Edwin
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.)
UNIVERSAL METAL PRODUCTS Co
Original Assignee
UNIVERSAL METAL PRODUCTS Co
Publication date
Application grantedgrantedCritical
Publication of CA641569ApublicationCriticalpatent/CA641569A/en