A cutting accessory for use with a powered surgical tool. The accessory includes a drive shaft to which an outer hub is attached. Internal to the outer hub is a self-contained transponder formed from an RFID chip and a coil of electrical conductor embedded within a solid substrate or encapsulated within...http://www.google.com/patents/US20040220602?utm_source=gb-gplus-sharePatent US20040220602 - Surgical cutting accessory with encapsulated RFID chip
