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
CA874880A
Inventor
R. Engstrom Hans-Erik
L. Wallstrom Gunnar
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.)
Valmet AB
Original Assignee
Sunds AB
Publication date
Application grantedgrantedCritical
Publication of CA874880ApublicationCriticalpatent/CA874880A/en