Hedy Lamarr
Hedy Lamarr (1914–2000) was an Austrian-born American film actor and inventor. With composer George Antheil, she developed and patented a frequency-changing radio system intended to make the control signals for radio-guided torpedoes harder to jam. Her work is recognized as an early contribution to spread-spectrum communications, although it should not be confused with inventing modern Wi-Fi, GPS or Bluetooth systems.
Early life and film career
Born Hedwig Eva Maria Kiesler in Vienna, Lamarr began acting in European films as a teenager. After moving to the United States in 1937, she became a Hollywood star under the name Hedy Lamarr. Her English-language film debut was in Algiers (1938), and later roles included Samson and Delilah (1949), one of the most commercially successful films of her career. Her public fame as an actor often overshadowed her interest in technical problem-solving and invention.
A radio system designed to resist jamming
During the Second World War, Lamarr wanted to contribute to the Allied effort. In 1940 she met composer and inventor George Antheil, and the two worked on a method for guiding radio-controlled torpedoes while making it more difficult for an adversary to interfere with the control signal. Their proposal used synchronized transmitters and receivers that changed among radio frequencies together. The patent described coordinated records made from perforated paper rolls, an approach inspired in part by player-piano mechanisms.
Lamarr and Antheil filed their U.S. patent application in June 1941. The patent, titled “Secret Communication System,” was granted in August 1942 to Hedy Kiesler Markey and George Antheil. The design is now commonly discussed as an early frequency-hopping or spread-spectrum approach to secure radio communication.
The proposal and its later recognition
The U.S. Navy did not adopt the patented system during the war. Lamarr and Antheil therefore did not see the device put into wartime service, and the patent expired in 1959. Their work received wider public recognition decades later: the Electronic Frontier Foundation honored Lamarr and Antheil in 1997, and Lamarr was inducted into the National Inventors Hall of Fame in 2014.
The invention is often connected in popular accounts with Wi-Fi, GPS and Bluetooth. That shorthand can be misleading: Lamarr and Antheil patented a particular system for radio control of torpedoes, not those later technologies as complete systems. The IEEE Standards Association notes that an early IEEE 802.11 wireless-LAN standard used a frequency-hopping mode related to the patent, while modern wireless technologies developed through many later contributions.
Key facts
- Born
- 1914, Vienna, Austria, as Hedwig Eva Maria Kiesler.
- Occupation
- Film actor and inventor.
- Collaborator
- Composer and inventor George Antheil.
- Patent
- U.S. Patent 2,292,387, “Secret Communication System,” granted in 1942.
- Recognition
- Received the Electronic Frontier Foundation's Pioneer Award with Antheil in 1997; inducted into the National Inventors Hall of Fame in 2014.
Timeline
1914
Born Hedwig Eva Maria Kiesler in Vienna, Austria.
1937
Moved to the United States and began her Hollywood career.
1940
Met George Antheil and began collaborating on a radio-control idea.
1941
Filed a U.S. patent application for the “Secret Communication System.”
1942
The U.S. patent was granted.
1959
The patent expired.
1997
Lamarr and Antheil received the Electronic Frontier Foundation's Pioneer Award.
2000
Died in Florida, United States.
2014
Inducted into the National Inventors Hall of Fame.
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Answers use only “Hedy Lamarr” and its references, with citations.
References
- 1.Hedy Lamarr Biography, Movies, & Facts
Encyclopaedia Britannica · other · reliability: high · retrieved 17 October 2026
Supports: Biographical overview of Lamarr's birth, migration, acting career and invention with George Antheil.
- 2.A Movie Star, Some Player Pianos, and Torpedoes
Lemelson Center for the Study of Invention and Innovation, Smithsonian National Museum of American History · other · reliability: high · retrieved 17 October 2026
Supports: Research-based account of Lamarr and Antheil's collaboration, the patent's technical concept, the Navy's decision not to adopt it, its expiration and later recognition.
- 3.US2292387A - Secret communication system
United States Patent Office patent document, via Google Patents · other · reliability: high · retrieved 17 October 2026
Supports: Primary patent document, filed June 10, 1941 and granted in 1942, describing synchronized frequency changes for radio communication and remote craft such as torpedoes.
- 4.Hedy Lamarr │ The National Inventors Hall of Fame
National Inventors Hall of Fame · other · reliability: high · retrieved 17 October 2026
Supports: Biography of Lamarr and Antheil's frequency-hopping concept and her 2014 induction.
- 5.Actress/Inventor Hedy Lamarr – and How Far Wireless Communication Has Come
IEEE Standards Association · other · reliability: high · retrieved 17 October 2026
Supports: Discusses the patent's connection with frequency-hopping methods and the historical use of that mode in an early IEEE 802.11 standard.
- 6.12 Pioneering Women in Tech: EFF Celebrates Ada Lovelace Day
Electronic Frontier Foundation · other · reliability: high · retrieved 17 October 2026
Supports: Records the 1997 special Pioneer Award honoring Lamarr and Antheil.
References are suggested by the research engine and may be incomplete. Unverified URLs are omitted rather than guessed.
Article history
- Version 117 October 2026 · EditorCreated by Zapia