On September 20, 2013, the Canadian Intellectual Property Office published Apple's latest trademark filing for "Touch ID," which was originally filed on Monday. Touch ID debuted on the iPhone 5S last Tuesday and is heavily integrated into iOS 7. Users will be able to unlock their iPhone as well as make purchases in iTunes, the App Store or iBooks using Touch ID. The sensor can read up to 5 fingerprints. Apple fans will be able to get their fingerprints on it starting today.