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.
Snapshot of Card Features. 1  Earn unlimited 1.5% cash back on every purchase, every day. 2  No rotating categories or sign ups needed to earn cash rewards; plus, cash back doesnât expire and thereâs no limit to how much you can earn. 3  Get access to a higher credit line after making your first 5 monthly payments on time.