This is how Raytheon began experimenting with microwaves (the waves) to create the first microwave ... than gas ovens. A first time for the product, but certainly not the last. Amana Corporation ...

To scale down to household size, Raytheon bought an appliance company called Amana Refrigeration in 1965, which allowed it to create and release the first countertop microwave oven for around $500 ...