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[PT5107A], Technical Note, William Abbott Hardy, Thomas Alva Edison, April 16th, 1919

Title: [PT5107A], Technical Note, William Abbott Hardy, Thomas Alva Edison, April 16th, 1919
Author: Hardy, William Abbott; Edison, Thomas Alva
Date: 1919-04-16
Type: Technical Note
Subject: Patent application; Disc record and duplicating technology
Folder ID: PT5107-F
Microfilm ID: 247:289
Document ID: PT5107A
URL: https://edisondigital.rutgers.edu/document/PT5107A
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 247