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
CA817780A
Inventor
R. Gulliver Charles
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.)
Lawson and Jones Ltd
Original Assignee
Lawson and Jones Ltd
Publication date
Application grantedgrantedCritical
Publication of CA817780ApublicationCriticalpatent/CA817780A/en