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Scientific American,
1877.
McCabe, p. 859; Official Catalogue, Dept III, p. 332. |
Gray & Barton, Western Electric Manufacturing (or
Telegraph) Co., Chicago, IL. Gray's automatic printer (or printing
telegraph). |
. |
Ingram, p. 295; Official Catalogue,
Dept III, p. 331, and Dept V, p. 147. |
Elisha Gray, Chicago, IL. Electro-harmonic telegraph,
including apparatus for transmitting eight or more messages
simultaneously. |
. |
Official Catalogue,
Dept III, p. 331, and Dept V, p. 147. |
William J. Philips, Philadelphia, PA. Printing
telegraph instrument, combining the bell, dial, and printing telegraph in
one instrument. |
. |
Official Catalogue,
Dept III, p. 331, and Dept V, p. 147. |
Philadelphia, Reading & Pottsville Telegraph Co.,
Philadelphia, PA. Duplex and Morse telegraph. |
. |
Official Catalogue,
Dept V, p. 147. |
Launert &
Decker, Cleveland, OH. Alphabetical telegraph instruments. |
. |
Official
Catalogue, Dept III, p. 331. |
Lockwood, Brooks
& Co., Boston, MA. Computing telegraph. |
. |
Official
Catalogue, Dept III, p. 331. |
William B.
Watkins, New York, NY. Duplex telegraph. |
. |
Official
Catalogue, Dept III, p. 332. |
Alexander
Graham Bell, Boston, MA. Electro-harmonic telegraph. |
. |
Official
Catalogue, Dept III, p. 332. |
Samuel
S. White, Philadelphia, PA. Electro-harmonic telegraph. |
. |
Official
Catalogue, Dept III, p. 331. |
Standard
Laundry Machinery Co., Boston, MA. Telegraph copying machine. |