A code-reading apparatus determines the type of data in recorded code data and carries out appropriate processes depending on the determined type of data. The code-reading apparatus comprises an imaging unit 7 for photographing encoded data. The encoded data comprises a header portion and a body portion,...http://www.google.com.tw/patents/US20040014490?utm_source=gb-gplus-share專利 US20040014490 - Code structure and code reading terminal
