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 claimed from SE8405680Aexternal-prioritypatent/SE452101B/sv
Application filed by Leif Einar Stern, Sten Gunnar DrennowfiledCriticalLeif Einar Stern
Application grantedgrantedCritical
Publication of ATE40282T1publicationCriticalpatent/ATE40282T1/de