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Application filed by Grafitbergbau Kaisersberg FranfiledCriticalGrafitbergbau Kaisersberg Fran
Priority to AT457162ApriorityCriticalpatent/AT248582B/de
Priority to DE19631519156prioritypatent/DE1519156C/de
Application grantedgrantedCritical
Publication of AT248582BpublicationCriticalpatent/AT248582B/de