Url https://edisondigital.rutgers.edu/document/QCE02295 Resource class dctype:Text Title [QCE02295] Patent Caveat, February 24th, 1875 Creator Edison, Thomas Alva Subject Multiple telegraphy (duplex, quadruplex) Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1875-02-24 Type Patent Caveat Identifier QCE02295 Source 10:840 Rights Thomas Edison National Historical Park Date Created 1875-02-24 Has Version https://archive.org/details/edisonmicrofilm10/page/n849/mode/1up Archive.org Viewer, Microfilm Series Reel 10 Is Part Of QCE02-F Uri https://edisondigital.rutgers.edu/document/QCE02295 https://edisondigital.rutgers.edu/document/QCE02295 --