Who invented microwave ovens?

The Nazis, for use in their mobile support operations, originally developed microwave "radiomissor" cooking ovens to be used for the invasion of Russia. By being able to utilize electronic equipment for preparation of meals on a mass scale, the logistical problem of cooking fuels would have been eliminated, as well as the convenience of producing edible products in a greatly reduced time-factor.
After the war, the Allies discovered medical research done by the Germans on microwave ovens. These documents, along with some working microwave ovens, were transferred to the united States War Department and classified for reference and "further scientific investigation." The Russians had also retrieved some microwave ovens and now have thorough research on their biological effects. As a result, their use was outlawed in the Soviet union. The Soviets issued an international warning on the health hazards, both biological and environmental, of microwave ovens and similar frequency electronic devices.
Other Eastern European scientists also reported the harmful effects of microwave radiation and set up strict environmental limits for their usage. The united States has not accepted the European reports of harmful effects, even though the EPA estimates that radio frequency and microwave radiation sources in America are increasing at 15% per year.