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.
Quora User, Ð¿Ð¾ÑÐµÐ¼ÑÑÐºÐ° (asks a lot of questions) According to a recent NPR All Things Considered, Lamarr co-invented frequency-hopping, a.k.a. spread-spectrum radio, which could foil signal jamming. Along with co-inventor George Antheil, they received a patent from the National Inventor's Council in 1942.