Bennett, who had a Master_s degree in engineering, wanted to exploit an idea of his to combine a refrigerator, freezer, and 500-watt microwave oven into a single unit for sale to college students. Bennett was aware that many colleges had rigid policies against cooking in student dormitories because of the risk of fire posed by hot plates. According to the National Fire Protection Association, there were over 1,600 fires annually on college campuses. Bennett had devised electronic circuitry that shut off power to the refrigerator/freezer whenever the microwave oven was switched on. In this way, the unit would never pull more than 10 amps of current. By comparison, a hot plate in tandem with a refrigerator drew about 20 amps….