Igor Sikorsky
Juan de la Cierva, a spaniard is responsible for the helicopters we see today but the first helicopter was invented by the polish pioneer Oszkár Asbóth
Igor Sikorski was well on the way with inventing the first practical helicopter then
The Wright brothers.
a Dutch spectacle-maker from Middlburg credited with inventing, or contributing advances towards the invention of the first telescope. Jansen is sometimes credited for inventing the first truly compound microscope.
Alessandro Volta is credited with inventing the first battery in 1800. His invention, known as the Voltaic pile, was the first electrochemical cell capable of producing a steady electric current.
In 1961, Leonard Kleinrock was the first to publish a paper about the idea of packet switching, which is essential to Internet. Sources: http://www.chacha.com/question/who-is-credited-for-inventing-the-internet
Karl Benz
Herbert A. Gilbert is credited with inventing the first electronic cigarette in 1963.
Henry Parmelee is credited with inventing the first open head sprinkler system. The piano company owned by Henry Parmelee was the first building in the United States that had a fire suppression system.
Wilbur and Orville Wright are credited with inventing the airplane.
it is Archytas