Lamarr and Anthiel received a patent in 1941, but the enormous significance of their invention was not realized until decades later. It was first implemented on naval ships during the Cuban Missile Crisis and subsequently emerged in numerous military applications.
Cash back credit card reward programs started out rather simply, offering a flat percentage rate (typically 1 percent of purchases) rebated back to the customer in the form of a check at the end of the year or a statement credit.
Thatâs a total of 5% cash back, which means you can earn up to $75 cash back ($15 cash back plus your $60 bonus cash back). You must activate your 5% cash back by December 14, 2015 and use your card between October 1 and December 31, 2015 in the bonus categories to earn bonus cash back.