Cooke and Wheatstone telegraph
The Cooke and Wheatstone telegraph was an early electrical telegraph system dating from the 1830s invented by English inventor William Fothergill Cooke and English scientist Charles Wheatstone. It was the first telegraph system to be put into commercial service. The receiver consisted of a number of needles which could be moved by electromagnetic coils to point to letters on a board. This feature was liked by early users who were unwilling to learn codes, and employers who did not want to invest in staff training.
Compagnie générale de la télégraphie sans fil
From the mid-19th century the world was connected with an increasingly dense network of telegraph wires and submarine cables.
In 1887 Heinrich Hertz of Germany conclusively proved the existence of electromagnetic waves.
Alexander Stepanovich Popov of Russia developed antennas to transmit and receive radio waves.
Scientists such as Édouard Branly and Nikola Tesla also contributed to development of the concepts.
In 1895 Guglielmo Marconi, a student at the University of Bologna, invented wireless telegraphy.
In 1897 he founded the Wireless Telegraph & Signal Company in England.
Its subsidiary the Marconi Wireless Telegraph Company of America was formed in the US in 1899.
The Telefunken company was created in Germany in 1903 as a joint venture of Siemens and AEG.