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
CA679318A
Inventor
Nilsson Erland
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.)
ABB Norden Holding AB
Original Assignee
Allmanna Svenska Elektriska AB
Publication date
Application grantedgrantedCritical
Publication of CA679318ApublicationCriticalpatent/CA679318A/en