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Application filed by Franz Bandhauer, Richard BellakfiledCriticalFranz Bandhauer
Application grantedgrantedCritical
Publication of AT108059BpublicationCriticalpatent/AT108059B/de
AT108059D1926-10-111926-10-11Automatischer Kontrollanzeiger für vollautomatische Telephone mit Wählscheibe nach dem Fingerscheiben-System.
AT108059B
(de)