When was the first microwave invented and by whom?

Percy Spencer invented the microwave in 1945. Percy Lebaron Spencer was an American self-taught engineer and inventor. He was born on July 19, 1894 in Howland, Maine, and died on September 8, 1970 in West Yarmouth, Massachusetts. Spencer was a pioneer in the field of radar, and his invention of the microwave was a by-product of his work in this field.