Notable Inventions of the 1920s
Dates for inventions are often controversial. Inventions are often invented by several inventors around the same time, or may be invented in an impractical form many years before another inventor improves the invention into a practical form. Where there is ambiguity, the date of the first working version of the invention is used here.
1921: Polygraph: John A. Larson
1922: Radar: Robert Watson-Watt, A. H. Taylor, L. C. Young, Gregory Breit, Merle Antony Tuve
1922: Technicolor: Herbert T. Kalmus
1922: Water skiing: Ralph Samuelson
1922: Photography : First mass production photo machine:Arthur C. Pillsbury
1922: Hornless rodeo saddle : Earl W. Bascom
1923: Arc tube: Ernst Alexanderson
1923: Sound film: Lee DeForest
1923: Television Electronic: Philo Farnsworth
1923: Wind tunnel: Max Munk
1923: Autogyro: Juan de la Cierva
1923: Xenon flash lamp: Harold Edgerton
1925: Ultra-centrifuge: Theodor Svedberg - used to determine molecular weights
1924: frozen food
1924: Rodeo bareback rigging: Earl W. Bascom
1925: Television Nipkow System: C. Francis Jenkins
1925: Telephoto: C. Francis Jenkins
1926: Television Mechanical Scanner: John Logie Baird
1926: Aerosol spray: Rotheim
1927: Mechanical cotton picker: John Rust
1927: PEZ Candy: Eduard Haas III
1927: Photography:First microscopic motion picture camera: Arthur C. Pillsbury
1927: Model T Ford: Henry Ford
1928: Sliced bread: Otto Frederick Rohwedder
1928: Electric dry shaver: Jacob Schick
1928: Antibiotics: Alexander Fleming (initial discovery of penicillin)
1928: Preselector gearbox: Walter Gordon Wilson
1929: Electroencephelograph (EEG): Hans Berger
1929: Kinescope:Vladimir Zworykin
1929: Photography:First X-Ray motion picture camera:Arthur C. Pillsbury
1920s: Band aid: Earle Dickson
1920s: Insulin: Paul Langerhans
1920s: Mechanical potato peeler: Herman Lay