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
CA635980A
Inventor
F. H. Pfeiffer Claes
O. Valanti Veikko
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.)
ESAB AB
Original Assignee
Claes F H Pfeiffer
Veikko O Valanti
Elektriska Svetsnings AB
Publication date
Application grantedgrantedCritical
Publication of CA635980ApublicationCriticalpatent/CA635980A/en