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
CA811598A
Inventor
John E. Cottrill
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.)
Allen Doreen E
Stallard George H
Original Assignee
Allen Doreen E
Stallard George H
Publication date
Application grantedgrantedCritical
Publication of CA811598ApublicationCriticalpatent/CA811598A/en