Quadruplex-Telegraph Repeaters, October 22, 1878

Item

Title

Quadruplex-Telegraph Repeaters, October 22, 1878

Author

Thomas A. Edison

Date Executed

1875-02-24

Date Filed

1875-03-23

Date Issued

1878-10-22

Type

Patent Issued

Subject

Telegraphy and Telephony

Document ID

PAT209241

Has Format

https://iiif.archive.org/iiif/edisonpatent209241/manifest.json

Rights

Edison's patents are in the public domain and have been made available through the generosity of David Kovanen.

Publisher

The Thomas A. Edison Papers