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
CA840754A
Inventor
W. D. Whadcoat Frank
Cooper Donald
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.)
Dorstel Press Ltd
Original Assignee
Dorstel Press Ltd
Publication date
Application grantedgrantedCritical
Publication of CA840754ApublicationCriticalpatent/CA840754A/en