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
CA888328A
Inventor
D. Birchall Thomas
L. Powell Johnnie
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.)
Mandrel Industries Inc
Original Assignee
Johnnie L Powell
Thomas D Birchall
Mandrel Industries Inc
Publication date
Application grantedgrantedCritical
Publication of CA888328ApublicationCriticalpatent/CA888328A/en