This study used patent analysis to explore the technological developments of Radio Frequency Identification (RFID). This study did not only discuss the technological developments of RFID, but also compared the competition among countries and companies. The patent data of this study were obtained from United States Patent and Trademark Office (USPTO). Major results are analyzed by using patent indicators. The results of this study indicated America has the competitive advantages of RFID in the country level, while Micron Technology has the competitive advantages of RFID in the company level. Moreover, the patents of RFID were concentrated on the UPC-340/572/001. The results in this study provided a valuable reference for RFID companies and governments.