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
CA789758A
Inventor
E. Rollman Ernest
Szerenyi Andrew
M. Milner George
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.)
RO-SEARCH
Original Assignee
RO-SEARCH
Publication date
Application grantedgrantedCritical
Publication of CA789758ApublicationCriticalpatent/CA789758A/en