[Worldkings] Top 50 inventions and discoveries made by accident (P. 01) Percy Spencer accidentally found the principle of making a microwave oven thanks to a molten candy bar
(Worldkings.org) In 1945, while standing near a active magnetron, a chocolate bar melted in Percy Spencer's pocket — and a new idea for a microwave oven was born.
[Worldkings] Top 100 pioneers in all fields (P. 49) Percy Spencer (USA): The inventor of the world's first microwave oven
(Worldkings.org) American engineer Percy Spencer is generally credited with inventing the modern microwave oven after World War II from radar technology developed during the war. Named the "Radarange", it was first sold in 1946.
(Worldkings.org) Raytheon patented microwave oven on October 8, 1945 and began development and production. For his invention of microwave oven, Spencer received no royalties.