21 ore 12 min, 15 apr 1896 anni - Guglielmo Marconi's Radio invention

Descrizione:

Guglielmo Marconi sent and received Morse code-based radio signals at distances spanning nearly 4 miles. The same year, Marconi got the first patent in wireless telegraphy in England. In 1897 Serbian-American Nikola Tesla invented the induction coil or Tesla coil, a device essential to sending and receiving radio waves and applied for his first patents in radio work in the United States.