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[D7903ZDP], Letter from Thomas Alva Edison to Hamilton McKown Twombly, May 6th, 1879

Title: [D7903ZDP], Letter from Thomas Alva Edison to Hamilton McKown Twombly, May 6th, 1879
Editor's Notes: Brooks patent may not hold; anticipated by 1861 publication. "At least broad claim cannot be taken on liquid insulator."
Author: Edison, Thomas Alva
Recipient: Twombly, Hamilton McKown
Mentioned: Brooks, David
Date: 1879-05-06
Type: Letter
Subject: Patents; Cables, feeders, and other exterior elements
Folder ID: D7903-F
Microfilm ID: 49:224
Document ID: D7903ZDP
URL: https://edisondigital.rutgers.edu/document/D7903ZDP
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 49

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