<P> On 8 October 1945 , Raytheon filed a United States patent application for Spencer 's microwave cooking process , and an oven that heated food using microwave energy from a magnetron was soon placed in a Boston restaurant for testing . </P>
<P> On 8 October 1945 , Raytheon filed a United States patent application for Spencer 's microwave cooking process , and an oven that heated food using microwave energy from a magnetron was soon placed in a Boston restaurant for testing . </P>
where was the first microwave oven placed for testing
where was the first microwave oven placed for testing
a Boston restaurant
a Boston restaurant