Frequency-hopping communications patent, 1942

Numéro d’image : 12645085
Frequency-hopping communications patent, 1942
Frequency-hopping communications patent, 1942. Printed patent drawings describing a frequency-hopping spread spectrum (FHSS) method of secret communication proposed during the Second World War. This prevents radio signals from being tracked or jammed. The patent was filed by Austrian-born US film actress and inventor Hedy Lamarr (1914-2000) and US composer and inventor George Antheil (1900-1959). Lamarr was born Hedwig Kiesler. At the time of this patent she is referred to by her then-married name: H. K. Markey (Hedy Kiesler Markey). This is patent number 2, 292, 387 from the US Patent Office, dated 11 August 1942.
Licence : Droits gérés
Crédit: Science Photo Library / US National Archives And Records Administration
Taille de l’image : 2598 px × 3425 px
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Property Release : Non requis
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