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[D7508B1], Patent Caveat, Thomas Alva Edison, March 9th, 1875

Title: [D7508B1], Patent Caveat, Thomas Alva Edison, March 9th, 1875
Author: Edison, Thomas Alva
Date: 1875-03-09
Type: Patent Caveat
Subject: Multiple telegraphy (duplex, quadruplex)
Folder ID: D7508-F
Microfilm ID: 13:337
Document ID: D7508B1
URL: https://edisondigital.rutgers.edu/document/D7508B1
Rights: Thomas Edison National Historical Park
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Has Version: Archive.org Viewer, Microfilm Series Reel 13