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
CA819690A
Inventor
Meisel Heinrich
Romgens Hans
Zeppelzauer Franz
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.)
Rheinische Blattmetall AG
Original Assignee
Rheinische Blattmetall AG
Publication date
Application grantedgrantedCritical
Publication of CA819690ApublicationCriticalpatent/CA819690A/en