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[PT032AAH], Patent Application, Thomas Alva Edison, August 9th, 1887

Title: [PT032AAH], Patent Application, Thomas Alva Edison, August 9th, 1887
Author: Edison, Thomas Alva
Date: 1887-08-09
Type: Patent Application
Subject: Phonoplex and railroad telegraphy
Folder ID: PT032AAH-F
Microfilm ID: 114:108
Document ID: PT032AAH
URL: https://edisondigital.rutgers.edu/document/PT032AAH
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 114