Dúplex telefónico - Duplex telephonic

Dúplex telefónico - Duplex telephonic

Only 19 years after a timid introduction of telephony in Spain and seven years before the founding of the National Telephonic Company of Spain, Pascual Salmerón Gómez records his two patents: "Duplex telephonic" and "Simultaneous duplex telephonic with telegraph machines". Two hi...

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Bibliographic Details
Main Author:	Santos López, Pascual
Format:	Article
Language:	Spanish
Published:	Centro de Estudios Históricos Fray Pasqual Salmerón 2006-12-01
Series:	Andelma
Subjects:	Duplex telephonic History of Telegraphy History of Telephony History of Freemasonry
Online Access:	http://tecnologiaycultura.net/andelma/Andelma13.pdf#page=17

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