EDISON'S QUADRUPLEX TELEGRAPH. Share full article. Sept. 3, 1875. Credit... The New York Times Archives. See the article in its original context from September 3, 1875, Page 5 Buy Reprints.

quadruplex telegraphy, the important suit to try the ownership of the invention of thomas a. edison curious questions of law raised. Share full article April 23, 1878 ...

Forbes contributors publish independent expert analyses and insights. Gil Press writes about technology, entrepreneurs and innovation. Thomas Edison completes the construction of the first motion ...