A system for monitoring ingestion of medicine (21) comprises forming a digestible radio frequency identification (RFID) tag (10). The RFID tag is attached to the medicine. The RFID tag and medicine are ingested. A signal from the RFID tag is monitored....http://www.google.es/patents/US7616111?utm_source=gb-gplus-sharePatente US7616111 - System to monitor the ingestion of medicines
