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
CA665030A
Inventor
O. Sproule Donald
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.)
GLASS DEVELOPMENTS Ltd
Original Assignee
GLASS DEVELOPMENTS Ltd
Publication date
Application grantedgrantedCritical
Publication of CA665030ApublicationCriticalpatent/CA665030A/en