A Yagi–Uda antenna or simply Yagi antenna, is a directional antenna consisting of two or more parallel resonant antenna elements in an end-fire array; these elements are most often metal rods acting as half-wave dipoles.
invented by IBM
The IBM 610 Auto-Point Computer is one of the first personal computers, in the…
invented by Naum Gurvich William Kouwenhoven
Defibrillation is a treatment for life-threatening cardiac dysrhythmias,…
invented by Norman Joseph Woodland
A 10-pack of Wrigley’s Juicy Fruit chewing gum is the first product to…
invented by Christopher Cockerell
A hovercraft, also known as an air-cushion vehicle or ACV, is an amphibious…
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