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
CA730851A
Inventor
Becker Helmut
Frenk Helmuth
Schmidt Horst
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz GmbH
Publication date
Application grantedgrantedCritical
Publication of CA730851ApublicationCriticalpatent/CA730851A/en