// todo need optimize like in event.jsp. Add indexing or not indexing this page. The invention of Frequency Hopping (10 giug 1941 anni – 11 agos 1941 anni) (Il nastro del tempo)

The invention of Frequency Hopping (10 giug 1941 anni – 11 agos 1941 anni)

Descrizione:

Hedy Lamar and George Antheil sent in their invention called frequency hopping which was also called " the secret communication system" on June 10, 1941. it was then considered and granted on August 11,1942