Embodiments of an improved implantable medical device system for orientation-independent telemetry to and from the device are disclosed. The system includes an external controller which produces an electromagnetic field to induce a current in a coil in the implantable medical device and vise versa. In...http://www.google.com.tw/patents/US8175716?utm_source=gb-gplus-share專利 US8175716 - Multiple telemetry and/or charging coil configurations for an implantable medical device system
