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
CA743497A
Inventor
T. Orr Alfred
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.)
ALLAN J ANDERSON
JOHN COURNEYA
Original Assignee
ALLAN J ANDERSON
JOHN COURNEYA
Publication date
Application grantedgrantedCritical
Publication of CA743497ApublicationCriticalpatent/CA743497A/en