Most important inventions in the USA

- THE ELECTRIC LIGHT

The first supply of electric light in history happened in New York, in 1882, by Thomas Edison (the light bulb inventor).

- THE ESCALATOR

It was invented in 1897 by Jesse Reno, in New York.

- THE AIR CONDITIONER

It was invented in 1902 by Willis Haviland Carrier in New York City

- TYPEWRITER

The most efficient typewriter was invented in 1873 by E. Remington and Sons, in New York.

- THE HELICOPTER

In 1939 Igor Sikorsky created the first helicopter

- THE LIGHTNING ROD

It was invented by Benjamin Franklin in 1753

- THE INTERNET

It was invented in California by ARPA and the department of defense of the USA

- FACEBOOK

It was created by Mark Zuckerberg in 2004