Patent ID: 7299990

Claim:
A radio frequency identification system comprising: a printing paper including a radio frequency identification tag, the radio frequency identification tag including: a first sheet, the first sheet being made of a paper material substantially equal to the printing paper, a second sheet to be attached to the printing paper, the second sheet being made of an adhesive material, a first protection film disposed between the first sheet and an inlet, a second protection film disposed between the second sheet and the inlet, and an integrated circuit chip and an antenna disposed between the first sheet and the second sheet; an inkjet printer including: an inkjet drawing unit that draws a character or an image on the printing paper, and a communication unit that stores information related to the character or the image in the radio frequency identification tag at the same time that the inkjet drawing unit draws the character or image on the printing paper; a reader that reads the information stored in the radio frequency identification tag; and an external apparatus connected to the reader that displays or outputs the information.