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
CA671949A
Inventor
W. B. Freist Manfred
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.)
Industriewerke Karl Marx Stadt VEB
Original Assignee
Industriewerke Karl Marx Stadt VEB
Publication date
Application grantedgrantedCritical
Publication of CA671949ApublicationCriticalpatent/CA671949A/en