EntityQ131698367· pop 6· linked from 4 articlesWave TransmitterSign in to saveConnectionsradioEntityInternational Standard Book NumberEntityWikisourceEntityRio Grande do SulEntitydigital object identifierEntityInternational Standard Serial NumberEntityoptical fiberEntityOCLC, Inc.EntityLibrary of Congress Control NumberEntityradio receiverEntityradio transmitterEntityLee de ForestEntitytriodeEntitymegaphoneEntityOpen LibraryEntitywireless telegraphyEntityinduction coilEntityPhotophoneEntityUniversidade Federal do ParanáEntityFederal University of Rio Grande do SulEntityCategories1899 in Brazil19th-century inventionsBrazilian inventionsDiscovery and invention controversiesHistory of radioRadio in BrazilRadio technologyWikisource templates with missing id