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
CA641928A
Inventor
Naeser Gerhard
E. V. Helin Elis
Scholz Werner
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.)
Vodafone GmbH
ESAB AB
Original Assignee
Elis E V Helin
Gerhard Naeser
Mannesmann AG
Elektriska Svetsnings AB
Publication date
Application grantedgrantedCritical
Publication of CA641928ApublicationCriticalpatent/CA641928A/en