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Priority claimed from DE19883821997external-prioritypatent/DE3821997C1/de
Priority claimed from DE8901679Uexternal-prioritypatent/DE8901679U1/de
Application filed by Ver Glaswerke GmbhfiledCriticalVer Glaswerke Gmbh
Priority claimed from EP89109516Aexternal-prioritypatent/EP0348671B1/de
Application grantedgrantedCritical
Publication of ATE81915T1publicationCriticalpatent/ATE81915T1/de