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.
And to talk about how those systems work, we have to know how credit card charges work. It seems like a simple thing, especially in the USâswipe your card, wait a second or two for authorization, walk out of the store with your goods.nd to talk about how those systems work, we have to know how credit card charges work. It seems like a simple thing, especially in the USâswipe your card, wait a second or two for authorization, walk out of the store with your goods.