Title: In the matter of U.S. patent, no. 162,633, issued April 27, 1875, to Thomas A. Edison and George Harrington, assignees of said Edison, and application no. 99, for U.S. letters patent, dated August 19, 1874, assigned by Thomas A. Edison to himself and George B. Prescott
Subjects: Telegraph, Duplex system, Patents, Quadruplex system, Patent suits
Places: United States
People: Thomas A. Edison (1847-1931), George Harrington (-1892), George B. Prescott (1830-1894)