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[PT007A037], Patent Caveat, Thomas Alva Edison, January 20th, 1876

Title: [PT007A037], Patent Caveat, Thomas Alva Edison, January 20th, 1876
Author: Edison, Thomas Alva
Date: 1876-01-20
Type: Patent Caveat
Subject: Multiple telegraphy (duplex, quadruplex); Acoustic telegraphy
Folder ID: PT007A-F
Microfilm ID: 8:795
Document ID: PT007A037
URL: https://edisondigital.rutgers.edu/document/PT007A037
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 8