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[NV14042], Technical Note, Thomas Alva Edison, February 20th, 1878

Title: [NV14042], Technical Note, Thomas Alva Edison, February 20th, 1878
Editor's Notes: Variations on patent office model of 12 Feb
Author: Edison, Thomas Alva
Date: 1878-02-20
Type: Technical Note
Subject: Telephone
Folder ID: NV14-F
Microfilm ID: 4:183
Document ID: NV14042
URL: https://edisondigital.rutgers.edu/document/NV14042
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 4