Title: The invention of the electric speaking telephone
Authors: Bell, Alexander Graham, 1847-1922; Gray, Elisha, 1835-1901.; Edison, Thomas A. 1847-1931
Publisher: s.n.,
Year: 1881
Subjects: Bell, Alexander Graham, Trials, litigation, etc.; Gray, Elisha, Trials, litigation, etc.; Edison, Thomas A. Trials, litigation, etc.; Telephone United States; Patent infringement United States.