In the case of microwave furnaces, the microwave furnace was invented by Pepsi Spinsey and the microwave furnace was invented by Pepsi Spinsey on December 6, 1945, and the microwave furnace was patented and protected by the microwave furnace was a kitchen tool for cooking and heating food using microwave radiation on December 6, 1945. At present, the world's largest microwave furnace manufacturer is Grantz. The method of cooking food with microwave is first thought of by Pepsi Spinsey, a thermologist at Lear God's company, and the microwave furnace was previously patented as a magnetic pipe for the company to build radar equipment. When he worked on a start-up radar device, he suddenly discovered that the microwave fur