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Here are the some most popular inventions of the 18th, 19th and 20th centuries, from the cotton gin to the camera.01of 10
The TelephoneWestend61/Getty Images
The telephone is an instrument that converts voice and sound signals into electrical impulses for transmission by wire to a different location, where another telephone receives the electrical impulses and turns them back into recognizable sounds. In 1875, Alexander Graham Bell built the first telephone to electrically transmit the human voice. Nearly 100 years later, Gregorio Zara invented the videophone that debuted at the 1964 New York World's Fair.02of 10
The History of ComputersTim Martin/Getty Images
There are many major milestones in the history of computers, starting with 1936 when Konrad Zuse built the first freely programmable computer.
TelevisionH. Armstrong Roberts/ClassicStock/Getty Images
In 1884, Paul Nipkow sent images over wires using a rotating metal disk technology with 18 lines of resolution. Television then evolved along two paths - mechanical based on Nipkow's rotating disks, and electronic based on the cathode ray tube. American Charles Jenkins and Scotsman John Baird followed the mechanical model while Philo Farnsworth, working independently in San Francisco, and Russian émigré Vladimir Zworkin, working for Westinghouse and later RCA, advanced the electronic model.04of 10
The AutomobileImage by Catherine MacBride/Getty Images
In 1769, the very first self-propelled road vehicle was invented by French mechanic Nicolas Joseph Cugnot. It was a steam-powered model. In 1885, Karl Benz designed and built the world's first practical automobile to be powered by an internal-combustion engine. In 1885, Gottlieb Daimler took the internal combustion engine a step further and patented what is generally recognized as the prototype of the modern gas engine and later built the world's first four-wheeled motor vehicle.
The Cotton GinT. C. Knight/Getty Images
Eli Whitney patented the cotton gin - a machine that separates seeds, hulls and other unwanted materials from cotton after it has been picked - on March 14, 1794.06of 10
The CameraKeystone-France/Getty Images
In 1814, Joseph Nicéphore Niépce created the first photographic image with a camera obscura. However, the image required eight hours of light exposure and later faded. Louis-Jacques-Mandé Daguerre is considered the inventor of the first practical process of photography in 1837.07of 10
The Steam EngineMichael Runkel/Getty Images
Thomas Savery was an English military engineer and inventor who, in 1698, patented the first crude steam engine. Thomas Newcomen invented the atmospheric steam engine in 1712. James Watt improved Newcomen's design and invented what is considered the first modern steam engine in 1765.08of 10
The Sewing MachineEleonore Bridge/Getty Images
The first functional sewing machine was invented by the French tailor, Barthelemy Thimonnier, in 1830. In 1834, Walter Hunt built America's first (somewhat) successful sewing machine. Elias Howe patented the first lockstitch sewing machine in 1846. Isaac Singer invented the up-and-down motion mechanism. In 1857, James Gibbs patented the first chain-stitch single-thread sewing machine. Helen Augusta Blanchard patented the first zig-zag stitch machine in 1873.09of 10
The Light BulbSteve Bronstein/Getty Imahes
Contrary to popular belief, Thomas Alva Edison didn't "invent" the lightbulb, but rather he improved upon a 50-year-old idea. In 1809, Humphry Davy, an English chemist, invented the first electric light. In 1878, Sir Joseph Wilson Swan, an English physicist, was the first person to invent a practical and the longer-lasting electric light bulb (13.5 hours) with a carbon fiber filament. In 1879, Thomas Alva Edison invented a carbon filament that burned for 40 hours.10of 10
PenicillinRon Boardman/Getty Images
Alexander Fleming discovered penicillin in 1928. Andrew Moyer patented the first method of industrial production of penicillin in 1948.