Guglielmo Marconi invented his spark transmitter with antenna at his home in Bologna, Italy, in December 1894. He took his "Black Box" to Britain in Feb. 1896 and although it was broken by custom officials, he filed for British Patent number 12039 on June 2, 1896. He formed his first Wireless Telegraph and Signal Company in Britain in 1897 at age 23 and the world's first radio factory on Hall Street in Dec. 1898. The American Marconi Co. was formed in 1899. Marconi controlled patents for the Lodge tuner of 1900 with dial, and Fleming valve of 1904 that acted as a diode tube to amplify electrical current in one direction. His company sold spark transmitters to the U.S. Navy for point-to-point transmission."

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