An instrumentation system for monitoring various physiological functions in small animals utilizes injectable electronic devices. These implanted devices receive power and control data from an RF carrier signal by inductive coupling. The RF carrier is generated by an external control unit with a coil...http://www.google.com.au/patents/US20030114769?utm_source=gb-gplus-sharePatent US20030114769 - Microminiature radiotelemetrically operated sensors for small animal research
