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Filing date
Publication date
Application filed by Standard Telephon & TelegraphfiledCriticalStandard Telephon & Telegraph
Priority to AT240561ApriorityCriticalpatent/AT227788B/de
Priority to CH339962Aprioritypatent/CH429833A/de
Priority to DK130962Aprioritypatent/DK106232C/da
Priority to FR891904Aprioritypatent/FR81431E/fr
Priority to BE615460Aprioritypatent/BE615460A/nl
Application grantedgrantedCritical
Publication of AT227788BpublicationCriticalpatent/AT227788B/de