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[D8546ZBI], Letter from George Black to Erastus Wiman, October 17th, 1885

Title: [D8546ZBI], Letter from George Black to Erastus Wiman, October 17th, 1885
Editor's Notes: [LETTERHEAD: The Great North Western Telegraph Co. of Canada] Enclosure with foregoing letter to Edison. After scanning a diagram of Edison's phonoplex as installed on a wire from Toronto to Montreal, Black concluded "that it bears a very close resemblance to our Telephonic Telegraph apparatus--had one of my diagrams been used to set the apparatus up it could not have come closer;" claims infringement of Great North Western's patent of 1879; provides detailed analysis of the similarities and differences in the two systems; says "it's possible Mr. Edison has not heard of my arrangements."
Author: Black, George
Recipient: Wiman, Erastus
Mentioned: Edison, Thomas Alva
Date: 1885-10-17
Type: Letter
Subject: Patent interference; Telegraph
Folder ID: D8546-F
Microfilm ID: 78:653
Document ID: D8546ZBI
URL: https://edisondigital.rutgers.edu/document/D8546ZBI
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 78
License: CC0 1.0 Universal

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