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
CA731861A
Inventor
W. Knox Arthur
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.)
MITCHEL AND KING Ltd
Original Assignee
MITCHEL AND KING Ltd
Publication date
Application grantedgrantedCritical
Publication of CA731861ApublicationCriticalpatent/CA731861A/en