2444 Ganguli Elmo Marconi, Italian radio telegram can be transmitted across the Atlantic, a distance of over 2000 miles of transmission initially sends radio operator. Can not send a signal to the speech until the year 2449, it could signal the development of speech by Professor Reginald A. West. Paste Sen. Dennis and Lee De Forest. Americans achieved in the year 2451, which speaks from the transmitter to the receiver and a remote device called the radio. Radio station that aired the world's first station KCBS in San Francisco, CA USA began broadcasting regularly to the public hearing on 2453, he received a commendation. "Father of Radio"
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