The invention of Frequency Hopping (jun 10, 1941 – aug 11, 1941)
Description:
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 11,1942Added to timeline:
Date:
jun 10, 1941
aug 11, 1941
~ 2 months and 2 days