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
CA642563A
Inventor
P. Kuceski Vincent
C. Hill Norman
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.)
CP Hall Co
Original Assignee
CP Hall Co
Publication date
Application grantedgrantedCritical
Publication of CA642563ApublicationCriticalpatent/CA642563A/en