Url https://edisondigital.rutgers.edu/document/D7512N Resource class dctype:Text Title [D7512N], Memorandum, Thomas Alva Edison, 1875 Creator Edison, Thomas Alva Subject Patent assignments, licenses, and royalties Multiple telegraphy (duplex, quadruplex) Automatic telegraphy Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1875-00-00 Type Memorandum Identifier D7512N Source 13:506 Relation American Automatic Telegraph Co Atlantic and Pacific Telegraph Co Rights Thomas Edison National Historical Park Has Version https://archive.org/details/edisonmicrofilm13/page/n519/mode/1up Archive.org Viewer, Microfilm Series Reel 13 Is Part Of D7512-F Uri https://edisondigital.rutgers.edu/document/D7512N https://edisondigital.rutgers.edu/document/D7512N --