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1926	Robert H. Goddard invents liquid-fueled rockets.
1927	Eduard Haas III invents PEZ candy. JWA Morrison invents the first quartz crystal watch. Philo Taylor Farnsworth invents a complete electronic TV system. Technicolor invented. Erik Rotheim patents an aerosol can. Warren Marrison developed the first quartz clock. Philip Drinker invents the iron lung.
1928	Scottish biologist Alexander Fleming discovers penicillin. Bubble gum invented by Walter E. Diemer. Jacob Schick patented the electric shaver.
1929	American, Paul Galvin invents the car radio. Yo-Yo re-invented as an American fad.
1930	Scotch tape patented by 3M engineer, Richard G. Drew. The frozen food process patented by Clarence Birdseye. Wallace Carothers and DuPont Labs invents neoprene. The "differential analyzer", or analog computer invented by Vannevar Bush at MIT in Boston. Frank Whittle and Dr Hans von Ohain both invent a jet engine.
1931	Harold Edgerton invented stop-action photography. Germans Max Knott and Ernst Ruska co-invent the electron microscope.
1932	Polaroid photography invented by Edwin Herbert Land. The zoom lens and the light meter invented. Carl C. Magee invents the first parking meter. Karl Jansky invents the radio telescope.
1933	Frequency modulation (FM radio) invented by Edwin Howard Armstrong. Stereo records invented. Richard M. Hollingshead builds a prototype drive-in movie theater in his driveway.
1934	Englishmen, Percy Shaw invents cat eyes or roads reflectors. Charles Darrow claims he invented the game Monopoly. Joseph Begun invents the first tape recorder for broadcasting - first magnetic recording.
1935	Wallace Carothers and DuPont Labs invents nylon ( polymer 6.6.) The first canned beer made. Robert Watson-Watt patented radar.
1936	Bell Labs invents the voice recognition machine. Samuel Colt patents the Colt revolver.
1937	Chester F. Carlson invents the photocopier. The first jet engine is built.
1938	The ballpoint pen invented by Ladislo Biro. Strobe lighting invented. Roy J. Plunkett invented tetrafluoroethylene polymers or Teflon. Nescafe or freeze-dried coffee invented. The first working turboprop engine.
1939	Igor Sikorsky invents the first successful helicopter. The electron microscope invented.
1940	Dr William Reich invents the orgone accumulator. Peter Goldmark invents modern color television system. Karl Pabst invents the jeep.
1941	Konrad Zuse's Z3, the first computer controlled by software. Aerosol spray cans invented by American inventors, Lyle David Goodloe and W.N. Sullivan. Enrico Fermi invents the neutronic reactor.
1942	John Atanasoff and Clifford Berry built the first electronic digital computer. Max Mueller designs a turboprop engine.
1943	Synthetic rubber invented. Richard James invents the slinky. James Wright invent silly putty. Swiss chemist, Albert Hofmann discovered the hallucinogenic properties of LSD. Emile Gagnan and Jacques Cousteau invent the aqualung.
1944	The kidney dialysis machine invented by Willem Kolff. Synthetic cortisone invented by Percy Lavon Julian.
1945	Vannevar Bush proposes hypertext. The atomic bomb invented.
1946	The microwave oven invented by Percy Spencer.
1947	British/Hungarian scientist, Dennis Gabor, developed the theory of holography. Mobile phones first invented. Although cell phones were not sold commercially until 1983, AT&T came up with the idea way back. Bardeen, Brattain, and Shockley invent the transistor. Earl Silas Tupper patented the Tupperware seal.
1948	The Frisbee® invented by Walter Frederick Morrison and Warren Franscioni. Velcro ® invented by George de Mestral. Robert Hope-Jones invented the Wurlitzer jukebox.
1949	Cake mix invented.
1950	The first credit card (Diners) invented by Ralph Schneider.

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20th Century Inventions
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