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
CA867189A
Inventor
A. Hedley David
R. Jardine Maurice
Woodhead James
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.)
Roneo Ltd
Original Assignee
Roneo Ltd
Publication date
Application grantedgrantedCritical
Publication of CA867189ApublicationCriticalpatent/CA867189A/en