Telegraph-Signal Boxes, January 27, 1874
Item
- Title
- Telegraph-Signal Boxes, January 27, 1874
- Author
- Thomas A. Edison
- Date Executed
- 1872-11-26
- Date Filed
- 1872-12-03
- Date Issued
- 1874-01-27
- Type
- Patent Issued
- Subject
- Telegraphy and Telephony
- Document ID
- PAT146812
- Has Format
- https://iiif.archive.org/iiif/edisonpatent146812/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