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 CH873780Aexternal-prioritypatent/CH645675A5/de
Application filed by Schweizerische Aluminium AgfiledCriticalSchweizerische Aluminium Ag
Application grantedgrantedCritical
Publication of ATE9234T1publicationCriticalpatent/ATE9234T1/de