American Express Sued Over Clear Card Patent
Perfect Plastic Printing Corp. filed the suit Jan. 6 in the U.S. District Court for the Northern District of Illinois.
The company, which made standard opaque cards for Amex for several years, says it invented the technology American Express is using to issue clear cards. The technology is used in the card issuer’s “Blue” cards.
Payment cards block beams of light emitted by automated teller machines...
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