All Patents of Type: telegraphic apparatus |
Patents 1 -
7
of 7
|
Number | Date | Patentee | Title | Type |
17,355 | May 19, 1857 | M.G. Farmer, W.F. Channing | Electromagnetic Fire Alarm Telegraph for Cites | telegraphic apparatus |
21,492 | Sep. 14, 1858 | J.M. Batchelder, M.G. Farmer | Telegraph Insulator | telegraphic apparatus |
195,751 | Oct. 02, 1877 | T.A. Edison | Automatic Telegraph | telegraphic apparatus |
200,032 | Feb. 05, 1878 | T.A. Edison | Synchronous Movements for Electric Telegraphs | telegraphic apparatus |
333,289 | Dec. 29, 1885 | T.A. Edison | Telegraphy | telegraphic apparatus |
333,290 | Dec. 29, 1885 | T.A. Edison | Duplex Telegraphy | telegraphic apparatus |
333,291 | Dec. 29, 1885 | T.A. Edison | Way-Station Quadruplex Telegraph | telegraphic apparatus |