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
CA692499A
Inventor
O. L. Wallen Emil
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.)
Leje and Thurne AB
Original Assignee
Leje and Thurne AB
Publication date
Application grantedgrantedCritical
Publication of CA692499ApublicationCriticalpatent/CA692499A/en