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cavity magnetron tube
this is the main component to a microwave and it was originally supposed to be used to locate enemy ships and air crafts during WWII. -
Percy Spencer made a patent
he filed for a patent for the first microwave when he noticed that a chocolate bar had melted in his pocket while he was standing close to a cavity magnetron tube -
The RadaRange
This was the first commercial microwave. it was sold to restaurants, ship galleys and canteens. it was 750 pounds and 6 feet tall. This costed $5,000, which would be around $112,336 today.