Url https://edisondigital.rutgers.edu/document/PT020058 Resource class dctype:Text Title [PT020058], Patent Application, Thomas Alva Edison, March 20th, 1880 Creator Edison, Thomas Alva Subject Manufacturing Chemicals, chemical products, and chemical processes Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1880-03-20 Type Patent Application Identifier PT020058 Source 45:704 Relation Edison Ore Milling Co Ltd Rights Thomas Edison National Historical Park Date Created 1880-03-20 Has Version https://archive.org/details/edisonmicrofilm45/page/n716/mode/1up Archive.org Viewer, Microfilm Series Reel 45 Is Part Of PT020-F Uri https://edisondigital.rutgers.edu/document/PT020058 https://edisondigital.rutgers.edu/document/PT020058 --