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
CA633653A
Inventor
R. Burgess 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.)
ELIZABETH K BURGESS
RALPH E BURGESS
Royal Trust Co
Original Assignee
ELIZABETH K BURGESS
RALPH E BURGESS
Royal Trust Co
Publication date
Application grantedgrantedCritical
Publication of CA633653ApublicationCriticalpatent/CA633653A/en