Alexander Graham Bell was a Scottish-born inventor, scientist, and engineer who is credited with inventing and patenting the first practical telephone.
Guglielmo Marconi: an Italian inventor, proved the feasibility of radio communication. He sent and received his first radio signal in Italy in 1895.
Robert Watson-Watt : Radar (for Radio Detection And Ranging) was developed over the years with input from many sources, but it was Robert Watson-Watt.
Cornelis Drebbel, in full Cornelis Jacobszoon Drebbel, (born 1572, Alkmaar, Netherlands—died November 7, 1633, London, England), Dutch inventor who built the first navigable submarine.
Carl Benz : The first stationary gasoline engine developed by Carl Benz was a one-cylinder two-stroke unit which ran for the first time on New Year's Eve 1879.
Willis Carrier : Willis Haviland Carrier designed the first modern air-conditioning system, launching an industry that would fundamentally improve the way we live, work and play. Genius can strike anywhere.
King Camp Gillette was an American businessman. He invented a best-selling version of the safety razor. Several models were in existence before Gillette's design.
Charles Babbage : English mathematician and inventor Charles Babbage is credited with having conceived the first automatic digital computer.