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
CA685774A
Inventor
Berghaus Bernhard
Staesche Marie
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.)
Elektrophysikalische Anstalt Bernhard Berghaus
Original Assignee
Elektrophysikalische Anstalt Bernhard Berghaus
Publication date
Application grantedgrantedCritical
Publication of CA685774ApublicationCriticalpatent/CA685774A/en