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.
Earn cash back with the BankAmericard Cash Rewards credit card â 1% cash back on every purchase, 2% at grocery stores and now at wholesale clubs, and 3% on gas (up to $2,500 in grocery/wholesale club/gas quarterly spend) with no changing categories and no annual fee.