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
CA677968A
Inventor
Kohler John
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.)
Carpenter and Paterson Inc
Original Assignee
Carpenter and Paterson Inc
Publication date
Application grantedgrantedCritical
Publication of CA677968ApublicationCriticalpatent/CA677968A/en