-
Differential Analyzer
Vannevar Bush invented the differential analyzer that was a computing device that solved differential equations -
Electric Razor
Jacob Schick invented the electric razor that made shaving faster and more efficient -
FM Broadcasting
Edward Armstrong invented FM Broadcasting that provided high fidelity sound over the radio. -
Jet Engine
Sir Frank Whittle invented the jet engine and began testing in 1937. It gave airplanes the ability to fly at higher speeds in higher altitudes. -
Photocopier
Chester Carlson invented the photocopier which allowed people to make multiple copies of documents.