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
CA831756A
Inventor
E. Campbell Sherell
Original Assignee
Multigraphics Inc
Publication date
Application grantedgrantedCritical
Publication of CA831756ApublicationCriticalpatent/CA831756A/en