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
CA904052A
Inventor
K. Nestvogel Dieter
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.)
Duff Norton Co Inc
Original Assignee
Duff Norton Co Inc
Publication date
Application grantedgrantedCritical
Publication of CA904052ApublicationCriticalpatent/CA904052A/en