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Priority to DE1934P0010124priorityCriticalpatent/DE1301766U/de
Publication of DE1301766UpublicationCriticalpatent/DE1301766U/de
Alarmvorrichtung, insbesondere Nachtglocke fuer Apotheker, AErzte u. dgl., bei der die Benutzung von dem Einwurf eines bestimmten Geldstueckes abhaengig gemacht wird