History of the radio

Only Signals 1896-1906

1896 - Guglielmo Marconi first transmitted radio signals out a mile, he offered the invention to the Italian government, which turned it down. He offered it instead to the English government whom took the patent.

1897 – Marconi opened the first radio factory in Chelmsford Essex and established a radio link between France and Britain.

1901 – A link with the USA was established

1906 – Marconi received the Nobel Prize for Physics.

Tesla VS Marconi

1884 – Nikola Tesla invented the theoretical model for radio

1915 – Tesla failed to obtain a court junction against Marconi

1943 The US Supreme Court reviewed the decision and Tesla became acknowledged as the inventor of the radio despite never making a working model

On Air begins 1921 onwards

1915 - Speech was first transmitted from New York to San Francisco

1920 – A daily schedule began

1921 – Voice over the air was invented

1922 – Short wave transmissions were introduced

1927 – Commercial radiotelephony service link between North America and Europe was made

1933- Frequency modulated or FM was invented by Edwin Howard Armstrong

1935 - The first telephone call was made

1936 – Direct radiotelephone circuit was opened to Paris

1945- FM radio was introduced to Germany

1960 – Sony introduced their first transistorized radio which was small and required only a small battery.

1963 – Colour tv was commercially transmitted and the first radio was launched.

1970s – LORAN became the premier radio navigation system for the US Navy

1987 - GPS constellation satellite were launched.

1990s  – Digital radio was applied to broadcasting

Sources

https://www.thoughtco.com/invention-of-radio-1992382

https://didyouknow.org/history/radiohistory/

https://en.wikipedia.org/wiki/Timeline_of_radio