Hedy Lamarr

Hedy Lamarr was born Hedwig Eva Maria Kiesler in Vienna, most likely on 9 November 1914, though some records indicate slight variations in the date. Her father was a bank director and her mother a pianist. She displayed early talent for performing and at the age of seventeen appeared in the Austrian film Geld auf der Strasse (1930). In 1933 she appeared in the Czechoslovak film Ecstasy, which attracted considerable attention internationally.

In 1933 she married Friedrich Mandl, an Austrian arms manufacturer. The marriage exposed her to discussions of military technology and weaponry, though she left Mandl in 1937 and emigrated to London and subsequently to the United States. In Hollywood she signed a contract with MGM and adopted the stage name Hedy Lamarr. During the late 1930s and 1940s she appeared in a number of commercially successful films, including Algiers (1938), Boom Town (1940), Samson and Delilah (1949), and others.

During the Second World War, Lamarr collaborated with the composer George Antheil on a communications system intended to make radio-guided torpedoes more resistant to enemy jamming. The system they devised used a piano roll mechanism to synchronize rapid switching between radio frequencies. They received United States Patent 2,292,387 in August 1942 for a secret communication system. The patent expired before the technology was adopted by the military, and they received no financial compensation from its eventual applications.

The underlying principle of frequency-hopping spread spectrum, as documented in their patent, later became foundational to the development of technologies including Bluetooth and Wi-Fi, though the technical lineage is indirect and the connections were recognized primarily by later engineers and historians of technology.

Lamarr was awarded the Electronic Frontier Foundation Pioneer Award in 1997, shortly before her death. She died on 19 January 2000 in Casselberry, Florida, at the age of eighty-five. She became a United States citizen in 1953.