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
CA748350A
Inventor
Holgersson Sigbjorn
Junker Olle
Groth Kjell
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.)
Kopparfors AB
Original Assignee
Kopparfors AB
Publication date
Application grantedgrantedCritical
Publication of CA748350ApublicationCriticalpatent/CA748350A/en