TELECOMMUNICATIONS By xeniamorenor 1835 Electric telegraph Samuel Morse 1853 Multiplexing 1860 Telephone Meucci 1861 Transcontinental telegraph 1866 Submarine cable 1867 Discovery of radio J. C. Maxwell 1876 Telephone patent Alexander Graham Bell 1887 Generation of electromagnetic waves and detection in a device at 30 cm H. R. Hertz 1895 Wireless telegraphy Marconi 1901 First long distance wireless message Marconi 1906 Sound transmission R. Fessenden 1920 Commercial emission 1936 First broadcast of the Olympics Period: 1950 to 1960 Popularization of television 1969 People witnessing the arrival of the moon through television 1973 First cell phone call 1980 First commercial mobile phones 1990 First mobile phones of small dimensions and low price