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.)
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Publication date
Application filed by Arva AgfiledCriticalArva Ag
Priority claimed from PCT/CH1987/000161external-prioritypatent/WO1988004209A1/de
Application grantedgrantedCritical
Publication of ATE57321T1publicationCriticalpatent/ATE57321T1/de