1917 ⟶ Crystal Oscillator Invention
The crystal oscillator is invented by Alexander M. Nicholson...
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1917
1927
1928
1933
1973
1984
⏱️ Crystal Oscillator Invention
The crystal oscillator is invented by Alexander M. Nicholson using a crystal of Rochelle Salt although his priority was disputed by Walter Guyton Cady.⟶
ElectronicsRadio TechnologyTelecommunications
United States⏱️ Quartz Clock Invention
The quartz clock is invented by Warren Marrison and J.W. Horton at Bell Telephone Laboratories.⟶
TimekeepingPrecisionElectronics
United States📺 Philo Farnsworth Demonstrates Electronic Television
Philo Farnsworth demonstrates the first practical electronic television to the press.⟶
TelevisionCommunicationElectronicsBroadcastingMass Media
United States♿️ Invention of the First Lightweight, Folding Wheelchair
Harry C. Jennings Sr. and Herbert Everest, both mechanical engineers, invented the first lightweight, steel, folding, portable wheelchair with their "X-brace" design.⟶
Medical Technology
United States📱 Motorola Releases the DynaTAC 8000X, the First Commercial Cell Phone in the US
The first commercially available cell phone in the US, the DynaTAC 8000X, is created by Motorola.⟶
TelecommunicationsMobile PhonesConsumer ElectronicsCommunication
United States