It was approved in January 1950, and Raytheon began manufacturing the commercial microwave oven, called “Radarange.” According to the University of Maine, the invention is listed as Patent ...

Two years later, Raytheon launched the RadaRange as the first commercial microwave oven, which cost $5,000 at the time ($52,628 in 2015 dollars), weighed 750 pounds, and stood just shy of six feet ...