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