Which retail technology innovation was first patented by Norman Joseph Woodland and Bernard Silver in 1952, but didn't gain widespread retail adoption until the 1970s?

The retail landscape has been transformed by numerous technological innovations throughout history. Some inventions have completely revolutionized how consumers shop and how retailers manage their operations. This trivia question focuses on a pivotal technological breakthrough that changed the retail industry forever. Test your knowledge about this significant invention that bridged the gap between product identification and digital retail management.

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Barcode scanner
Electronic cash register
RFID tag
Self-checkout kiosk