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
CA837419A
Inventor
J. Caplan Knowlton
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.)
Hart Carter Co
Original Assignee
Hart Carter Co
Publication date
Application grantedgrantedCritical
Publication of CA837419ApublicationCriticalpatent/CA837419A/en