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.
The catch is that the credit card issuer must actually report your payments to the top three credit bureaus for your card use to improve your credit score and build up your credit history. Along with reporting your payments to credit bureaus, the best secured credit cards have no annual fee, cash back rewards and automatic account reviews to upgrade you to an unsecured card after several months.