modern microwave oven
The microwave oven was invented by Percy L. Spencer.
Percy Spencer, while working for the Raytheon Company, discovered a more efficient way to manufacture magnetrons.
The microwave oven was a by-product of another technology. It was during a radar-related research project around 1946 that Dr. Percy Spencer, an engineer with the Raytheon Corporation, noticed something very unusual.
Hall invented the magnetron that operates most microwave ovens, today.