US Patent 9305283 Association of item identifiers

A radio-frequency identification (RFID) reader system and an imaging device are provided. The RFID reader system is configured to read an RFID tag attached to an item at a location relative to a barcode. The barcode is associated with the item. Once the RFID reader system identifies the RFID tag, the imaging device uses the placement of the RFID tag and/or features of the RFID tag to identify and read the barcode. The imaging device may also identify the RFID tag. Once the barcode is identified, the barcode and the RFID tag are associated.