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
CA817814A
Inventor
W. Carlson Roy
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.)
ALBERT HEGLUND JR
Original Assignee
ALBERT HEGLUND JR
Publication date
Application grantedgrantedCritical
Publication of CA817814ApublicationCriticalpatent/CA817814A/en