Hollywood's Most Beautiful Woman Invented WiFi - and Never Got Paid

She was the face on the movie poster. She was also, quietly, the mind behind the technology in your pocket. The story of how Hollywood's biggest star became one of history's most consequential inventors - and never saw a cent of it - is one of the great injustices of the 20th century.

From Vienna to MGM

Hedy Lamarr was born Hedwig Eva Maria Kiesler on November 9, 1914, in Vienna. Her father, a Jewish banker, nurtured her curiosity about how things worked - taking her on walks where he explained the mechanics of the world around them. She showed early promise as an actress and by her early twenties had starred in the controversial 1933 film Ecstasy, which made her famous across Europe.

But fame came with a trap. She married Friedrich Mandl, one of Austria's wealthiest arms dealers, who used her as a social accessory and kept her under suffocating control. Mandl hosted Nazi and Fascist leaders at dinner, and Lamarr - seated decoratively nearby - absorbed everything they discussed about weapons technology. She filed the information away. In 1937, she disguised herself as a maid, slipped out of their estate, and fled to Paris. From there she made her way to London and onto a ship to America, where she intercepted Louis B. Mayer of MGM and talked her way into a contract. He billed her as "the most beautiful woman in the world."

The Invention Nobody Wanted

By 1940, Lamarr was one of Hollywood's biggest stars. She was also furious that the Allies were losing ships to German U-boats, whose submarines could jam radio-guided torpedoes and send them off course. She began sketching ideas for a torpedo guidance system that couldn't be jammed - one that would hop rapidly between radio frequencies in a synchronized pattern, making interception impossible.

At a 1940 Hollywood dinner party, she met George Antheil, an avant-garde composer who had experimented with synchronizing multiple player pianos. The mechanism was the breakthrough they needed: use a paper roll, like a player piano roll, to control the frequency-hopping sequence in both the torpedo and the transmitter simultaneously. Neither could be deciphered without the matching roll.

They filed their patent on June 10, 1941. US Patent 2,292,387 - titled "Secret Communication System" - was granted on August 11, 1942, filed under Lamarr's legal name at the time, Hedy Kiesler Markey. She and Antheil donated it to the U.S. government, refusing to profit from a wartime invention.

The Navy Said No

The U.S. Navy reviewed the patent and rejected it. Officials deemed the technology impractical and told Lamarr that she could contribute more to the war effort by using her celebrity to sell war bonds. She did - traveling 16 cities in 10 days, raising $25 million in a single fundraising tour in 1942. But the invention she'd worked on was shelved.

The patent expired in 1959 - the standard 17-year term. The technology had never been commercially deployed. George Antheil died that same year. Neither had earned a dollar from the patent.

The World Caught Up Too Late

In 1962 - three years after the patent expired - the U.S. Navy began using frequency-hopping spread spectrum technology in military communications. By the 1980s and 1990s, the same principles were being built into civilian wireless systems. The original IEEE 802.11 WiFi standard, ratified in 1997, used frequency-hopping spread spectrum across the 2.4GHz band. Bluetooth uses it. GPS uses it. Every wireless device you own depends on a concept that a Hollywood actress sketched out in 1940 to stop Allied sailors from dying.

The Electronic Frontier Foundation gave Lamarr its Pioneer Award in 1997 - the first time she received public recognition for the invention. She was 82 years old. Asked why she'd never pursued compensation, she reportedly said: "The good Lord gave me a nice face, and I should have been paid enough."

Forgotten in Florida

By 1981, Lamarr had retreated entirely from public life, settling in Florida. She spent her final decades as a near-recluse, communicating with her children mainly by phone - sometimes talking for six or seven hours a day, but rarely seeing anyone in person. In 1998, she sued software company Corel for using her likeness on their CorelDRAW packaging without permission. They settled out of court. It was one of her last public acts.

She died on January 19, 2000, at age 85, from heart disease at her home in Casselberry, Florida. Hollywood had largely forgotten her. The tech industry didn't know her name.

Fourteen years later, in 2014, the National Inventors Hall of Fame inducted her posthumously. The WiFi on your phone, the Bluetooth in your headphones, the GPS in your car - it all traces back to a patent filed by a woman Hollywood called its most beautiful face, who the Navy told to go sell kisses instead.