American Express Files for Blockchain-Based Patent System – CryptoSlate


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American Express Files for Blockchain-Based Patent System
CryptoSlate
After payments are written to the blockchain, for example, a customer could use their payment card or smartphone — whichever device was used to process the payment — to unlock a hotel door, rental, or gain “ticketless” access to an event, such as a ...
AmEx Applies For Patent To Put Proof Of Payment On BlockchainETHNews

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