Hedy Lamarr: The Actress Who Invented WiFi Technology

There’s a reason Hedy Lamarr’s name comes up every time someone asks what the actress who invented WiFi did. The woman once called “the most beautiful woman in film” also co-created a secret radio guidance system during World War II — a frequency-hopping design that later became a foundation for Bluetooth and GPS.

Born: November 9, 1914, Vienna, Austria ·
Died: January 19, 2000, Casselberry, Florida, USA ·
Known for: Film actress and co-inventor of frequency-hopping spread spectrum ·
Co-inventor: George Antheil ·
Patent year: 1942 (US Patent 2,292,387) ·
Posthumous honors: National Inventors Hall of Fame (2014)

Quick snapshot

1Confirmed facts

Co-invented frequency-hopping spread spectrum with George Antheil (National Inventors Hall of Fame (tier-1 institution))
Patent granted August 11, 1942 (Wikipedia (community encyclopedia))
Died of heart disease on January 19, 2000 (CBS News (established news outlet))

2What’s unclear

Actual IQ score (no verified test exists)
Exact details of her relationships with each spouse beyond basic records
Precise extent of her financial struggles in later life

3Timeline signal

1942: Patent granted for frequency-hopping communication system
1997: Electronic Frontier Foundation Pioneer Award
2014: Inducted into National Inventors Hall of Fame

4What’s next

Continued recognition in tech education and women-in-STEM initiatives
Further historical analysis of her patent’s impact on modern wireless

The table below distills nine core facts about Lamarr’s life from verified sources.

Nine key facts about Hedy Lamarr, from verified sources.
Attribute	Detail
Full name	Hedwig Eva Maria Kiesler
Born	November 9, 1914, Vienna, Austria-Hungary
Died	January 19, 2000, Casselberry, Florida, USA
Nationality	Austrian, later American citizen
Occupation	Actress, inventor
Known for	Frequency-hopping spread spectrum (WiFi, Bluetooth, GPS precursor)
Spouses	6 (Fritz Mandl, Gene Markey, John Loder, Ernest Stauffer, W. Howard Lee, Lewis J. Boies)
Children	James Lamarr Loder (adopted)
Awards	Electronic Frontier Foundation Pioneer Award (1997); posthumous National Inventors Hall of Fame (2014)

What did Hedy Lamarr actually invent?

Lamarr’s invention was a radio guidance system for Allied torpedoes that used frequency hopping — a technique that rapidly switched radio frequencies to prevent enemy jamming. She developed it during World War II with composer George Antheil, and their patent was issued on August 11, 1942. The concept later underpinned technologies like Bluetooth, WiFi, and GPS.

The patent with George Antheil

Lamarr and Antheil filed US Patent 2,292,387 on June 10, 1941 (Wikipedia (community encyclopedia))
The system used a player-piano-like mechanism to synchronize frequency changes between transmitter and receiver (National Inventors Hall of Fame (tier-1 institution))
The patent was donated to the U.S. Navy but not used until the 1960s (PolicyTracker (spectrum policy analysis))

The upshot

Lamarr’s invention was not just a clever idea — it was a fully patented system with six allowed claims. Decades later, those same principles became essential for secure wireless communications.

How frequency-hopping spread spectrum works

The system broadcast a signal over a seemingly random series of radio frequencies (National Inventors Hall of Fame (tier-1 institution))
Both transmitter and receiver followed