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[PAT274112], Patent Issued, George D'Infreville, March 20th, 1883

Title: [PAT274112], Patent Issued, George D'Infreville, March 20th, 1883
Author: D'Infreville, Georges
Date: 1883-03-20
Type: Patent Issued
Subject: Multiple telegraphy (duplex, quadruplex)
Folder ID: PA6-F
Document ID: PAT274112
URL: https://edisondigital.rutgers.edu/document/PAT274112
Rights: Pubilc domain.
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Alternative Title: Telegraph Apparatus