Marconi Wireless Telegraph Company of America government officials balked at returning the American Marconi stations to the original owners, distrusting British control of radio communication due to national security concerns. Lead by the U.S. Navy, the government pressured the Marconi companies to transfer American Marconi to a U.S. owner. The American Marconi assets were purchased by General Electric in 1919, which provided the foundation for creating its new subsidiary, the Radio Corporation of America. On July 20, 1897, the Wireless Telegraph and Signal Company, Limited, was founded in London to promote the radio inventions of Guglielmo Marconi. (The company's name was changed to Marconi's Wireless Telegraph
History of radio proposed electromagnetic or Hertzian waves as a navigation aid or means of communication, with Crookes writing on the possibilities of wireless telegraphy based on Hertzian waves in 1892. After learning of Hertz' demonstrations of wireless transmission, inventor Nikola Tesla began developing his own systems based on Hertz' and Maxwell's ideas, primarily working toward a means of wireless lighting, and power distribution. Tesla, concluding that Hertz had not demonstrated airborne electromagnetic waves (radio transmission), went on to develop a system based on what he thought was the primary conductor, the earth. In 1893 demonstrations of his ideas, in St. Louis, Missouri