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Impts of controlling induction. Phono is "legit part" of telephephone system of reproducing sound at distance. Willing to disclaim phono if it jeopardizes teleph patent. Quotes report comparing phono to emg. Carbon button finely divided. Can throw out claims 22 & 24. Misinterpret claim 18 (emg).","Date from docket, stamp, postmark"]},{"label":"Author","value":"Edison, Thomas Alva"},{"label":"Recipient","value":"Johnson, Edward Hibberd"},{"label":"Mentioned","value":"Gouraud, George Edward"},{"label":"Date","value":"1879-10-01"},{"label":"Type","value":"Letter"},{"label":"Subject","value":["Patent application","Telephone","Cylinder phonograph"]},{"label":"Folder/Volume ID","value":"D7941-F"},{"label":"Microfilm ID","value":"52:758"},{"label":"Document ID","value":"D7941ZEX"},{"label":"URL","value":"https://edisondigital.rutgers.edu/document/D7941ZEX"},{"label":"Rights","value":"Thomas Edison National Historical Park"},{"label":"Publisher","value":"Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University"},{"label":"Timestamp","value":"1 October 1879"},{"label":"Has Version","value":"Archive.org Viewer, Microfilm Series Reel 52"}],"sequences":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/D7941ZEX/sequence/normal","@type":"sc:Sequence","label":"Current Page 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