. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . Oily. PETERS. Pholo-Lithographer. Washington. D. C. TV A. EDISON, Telegraph Apparatus. 123,005,. 4 Sheets—Sheet 3. Patented Jany 23, 1872, M PETERS, Photo-Lithographer. Washington. D. C. 4 Sheets—Sheet 4, T. A. EDISON. Telegraph Apparatus. Patented JarVy 23, 1872.

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Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone