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
CA772488A
Inventor
Norman E. Russell
Original Assignee
ALUMINUM GOODS Ltd
Publication date
Application grantedgrantedCritical
Publication of CA772488ApublicationCriticalpatent/CA772488A/en