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Application filedfiledCritical
Priority to DD16128672ApriorityCriticalpatent/DD99204A1/xx
Priority to NL7206678Aprioritypatent/NL7206678A/xx
Priority to DE19722239573prioritypatent/DE2239573A1/de
Priority to AT715372Aprioritypatent/ATA715372A/de
Priority to FR7240322Aprioritypatent/FR2173902B3/fr
Publication of DD99204A1publicationCriticalpatent/DD99204A1/xx