Just when it seemed as if the near-term promise of benefits for restaurateurs from radio frequency identification chips, or RFID tags, was beginning to smell like spoiling fish, Seattle-based Blue C Sushi has begun using the technology to assure product freshness, improve purchases and track customer habits. RFID technology involves small, low-power chips that can wirelessly transmit data, such as a unique identifier code, across small spaces to specialized readers. Such systems ...

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