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
CA795862A
Inventor
Vach Josef
Susser Vaclav
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.)
Statni Vyzkumny Ustav Sklarsky
Original Assignee
Statni Vyzkumny Ustav Sklarsky
Publication date
Application grantedgrantedCritical
Publication of CA795862ApublicationCriticalpatent/CA795862A/en