Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to NL301994DpriorityCriticalpatent/NL301994A/xx
Application filed by Oesterr Amerikan MagnesitfiledCriticalOesterr Amerikan Magnesit
Priority to AT140063Aprioritypatent/AT238621B/de
Priority to DE1963O0007366prioritypatent/DE1892100U/de
Priority to ES0294953Aprioritypatent/ES294953A1/es
Priority to FR958935Aprioritypatent/FR1379316A/fr
Priority to GB169664Aprioritypatent/GB1023761A/en
Application grantedgrantedCritical
Publication of AT238621BpublicationCriticalpatent/AT238621B/de