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
CA640019A
Inventor
R. Coffing James
L. Winland Robert
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.)
COFFING INDUSTRIES
Original Assignee
COFFING INDUSTRIES
Publication date
Application grantedgrantedCritical
Publication of CA640019ApublicationCriticalpatent/CA640019A/en