Credit: ccarlstead CC-BY 2.0. Playing cards developed their four-suit design in the 1480s in France. By the late 1800s, factories mass-produced standard English playing cards that featured diamonds, hearts, clubs and spades, a design that prevails as of September 2014. Older cards were based on Latin suits of cups, swords, coins and rods.
Definition - What does Spread Spectrum mean? Spread spectrum is a technique used for transmitting radio or telecommunications signals. The term refers to the practice of spreading the transmitted signal to occupy the frequency spectrum available for transmission.
Thus, her take on spread-spectrum radio was born. Lamarr and her co-inventor, composer George Antheil, submitted their idea to the National Inventor's Council and received a patent for their  Secret Communication System  in 1942. They were anxious to share their invention with the Navy, but got a lackluster response.