Microwave Oven Patented 81 Years Ago Today

A Mr. Goodbar chocolate bar accidentally melting in an engineer's pocket changed kitchens forever. Percy Spencer, working on radar equipment at Raytheon, noticed microwaves from his active radar set had turned his snack into a gooey mess.

The self-taught engineer from Howland, Maine, saw opportunity where others might have seen annoyance. He immediately began experimenting with other foods to test his discovery.

Popcorn became the first food deliberately cooked using microwave energy. The second experiment was an egg, which promptly exploded in the face of one unlucky researcher.

After successful tests, Raytheon filed the patent on this day in 1945 and developed the first commercial microwave oven. The company, known primarily for making military equipment, created the "Radarange" for a Boston restaurant to test.

That first microwave stood nearly six feet tall and weighed 750 pounds. It cost about $5,000, equivalent to $66,000 in today's dollars, and needed water cooling to operate.

The Ripple Effect

What started as accidental chocolate melting now sits in over 90 percent of American homes. Modern microwaves weigh just 30 pounds, cost under $100, and help families prepare meals in minutes instead of hours.

Spencer's curiosity transformed a messy accident into technology that gives millions of people more time with their families instead of standing over hot stoves. His invention made nutritious home cooking accessible even on the busiest days.

The same radar technology that detected enemy aircraft during wartime found peaceful purpose heating leftovers and making popcorn for movie nights. Sometimes the most life-changing innovations come from the most unexpected moments.