1On March 7th, 876, Bell became the patentee of telephone invention.
There is still controversy about who invented the radio station.
Second, in 1893, nikola tesla publicly demonstrated radio communication for the first time in St. Louis, Missouri, USA. He described and demonstrated the basic principles of radio communication in the reports of Franklin College in Philadelphia and the National Electric Light Association. The instrument he made contains all the basic components of the radio system before the invention of the electron tube.
Guillermo Marconi holds the British patent number, which is widely regarded as the world's first patent on radio technology. 12039, "improvement of electric pulse and signal transmission technology and required equipment".
Nikola tesla 1897 obtained the patent of American radio technology. However, in 1904, the US Patent Office revoked its patent right and granted Marconi a patent for inventing radio instead. This move may be influenced by Marconi's economic supporters in the United States, including Thomas Edison and andrew carnegie. 1909 Marconi and karl ferdinand braun won the Nobel Prize in physics for inventing wireless telegraph.
1943, shortly after Tesla's death, the US Supreme Court re-affirmed Tesla's patent. This decision admitted that his invention had been completed before Marconi's patent. Some people think that this decision is obviously for economic reasons. In this way, the US government in World War II can avoid paying Marconi patent royalties.
1898, Marconi opened the world's first radio factory in Hall Street, chelmsford, England, with about 50 employees.
1924, British Baird invented the most primitive TV set, which transmitted images by telex.
American RCA 1939 introduced the world's first black-and-white TV set, 1953 formulated the national color TV standard, and 1954 introduced RCA color TV set.
1884, Morse invented the wired telegraph.
1895, Marconi invented the wireless telegraph.