3 Answers
- weirdoLv 69 years agoFavorite Answer
Radio/Television Transmission (1920)
Traffic Lights (1920)
Band-Aid (1920)
Hair Dryer (1920)
Lie Detector (1921)
Rocket (1926)
Penicillin (1928)
Frozen Food (1929)
Car with Combustion Engine (around 1920)
Artificial life begins -- the first robot built. 1921
Insulin invented by Sir Frederick Grant Banting. 1922
The first 3-D movie (spectacles with one red and one green lens) is released. 1922
The television or iconoscope (cathode-ray tube) invented by Vladimir Kosma Zworykin. 1923
John Harwood invented the self-winding watch. 1923
The dynamic loudspeaker invented by Rice and Kellogg. 1924
Notebooks with spiral bindings invented. 1924
The mechanical television a precursor to the modern television, invented by John Logie Baird. 1925
Eduard Haas III invents PEZ candy. 1927
JWA Morrison invents the first quartz crystal watch. 1927
Philo Taylor Farnsworth invents a complete electronic TV system. 1927
Technicolor invented. 1927
Erik Rotheim patents an aerosol can. 1927
Warren Marrison developed the first quartz clock. 1927
Philip Drinker invents the iron lung. 1927
Bubble gum invented by Walter E. Diemer. 1928
Jacob Schick patented the electric shaver. 1928
American, Paul Galvin invents the car radio. 1929
Hope this helps.
Source(s): http://www.buzzle.com/articles/inventions-of-the-1... http://inventors.about.com/od/timelines/a/twentiet... - Anonymous5 years ago
This Site Might Help You.
RE:
What inventions were made in the 1920's?
Source(s): inventions 1920's: https://knowledge.im/?s=inventions+1920's