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Polygraph Machine
The first Polygraph was invented by John Larson in Berkeley California. Larson was a cop and psychologist. The first polygraph simultaneously measured continuous changes in heart rate, blood pressure and respiration to detect deception. -
Talking Picture Show
the first talking picture show was invented by Joseph Tykociński on June 9, 1922. On September 17, 1922, the Tri-Ergon group gave a public screening of sound-on-film productions—including a dramatic talkie, Der Brandstifter (The Arsonist) before an invited audience at the Alhambra Kino in Berlin. -
Instant Camera
The first instant camera was invented in 1923 by Samuel Shlafrock. It consisted of a camera and portable wet darkroom in a single compartment. -
radio altimeter
Created in 1924 by Lloyd Espenschied, the radio altimeter is a device which measures the distance between the aircraft and the ground directly below it. this device was revolutionary as other devices could only measure the distances between the aircraft and a predefined sea-level. -
926: FIELD EFFECT SEMICONDUCTOR DEVICE CONCEPTS PATENTED
Polish-American physicist and inventor Julius E. Lilienfeld filed a patent in 1926.He filed a patent on controlling current flow in a semiconductor via captive coupling at an electrode essentially a field-effect transistor.
