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Steam Engine
The Steam Engine was invited in the UK by Thomas Savery. Its impact on the Industrial Revolution extended to the United States. Later improvements of the innovation contributed to the steam locomotive. http://www.custom-qr-codes.net/history-steam-locomotive.html
https://www.youtube.com/watch?v=GYAk5jCTQ3s -
Telephone
Alexander Graham Bell wanted to improve upon the invention of the telegraph. Consequently, he created the telephone, a form of instantaneous long-distance communication via audio. http://www.history.com/topics/inventions/alexander-graham-bell -
Cotton Gin
One of the primary reasons slavery continued to grow in the United States was due to the invention of the Cotton Gin. The Cotton Gin allowed the cotton to be produced and mass quantities consequently leading to mass profits. Southerners relied on slaves to use the cotton gin so slavery was expanded.
As a result, the cotton gin also impacted the Civil War.
http://www.civilwar.org/resources/civil-war-history-how-the.html -
Telegraph
Throughout the 1830's and 1840's Samuel Morse (and others) created the Telegraph; a device that transmitted signals via electronic wires. This rapidly decreased the waiting period for long-distance communication. Named after the inventor, Morse Code was used to transmit complex messages.
For more information: http://www.history.com/topics/inventions/telegraph -
Light bulb
The first commercially successful light bulb was created by Thomas Edison. However, several inventors developed methods of generating electricity before Edison's light bulb. People could now have an electric source of lighting in their homes so they did not have to rely on sunlight or candles. http://americanhistory.si.edu/lighting/19thcent/consq19.htm -
Television
January 26, 1926 marked the first public viewing of of live TV. John Logie Baird invented the first mechanical television that gave this public display. The picture was small and blurry, but it was a historical breakthrough. The television continued (and still continues) to develop throughout history. http://www.telegraph.co.uk/technology/google/google-doodle/12121474/Who-invented-the-television-John-Logie-Baird-created-the-TV-in-1926.html -
ENIAC
The world's first computers were huge both in size and cost. They also required a team of trained professionals to use them. The Americans' ENIAC cost hundreds of thousands, weighed 30 tons and took up nearly 2,000 square feet of floor space. http://www.smithsonianmag.com/history/the-brief-history-of-the-eniac-computer-3889120/ -
iPhone
Although, the iPhone was not technically the first smartphone, it brought phones to a whole new level. The invention has made a significant impact on the world today.
http://www.cultofmac.com/452022/today-apple-history-phone-declared-2007s-invention-year/