Be careful what you eat! RFID tags are now edible

Kodak has filed a new patent application (US Patent Application No2007/0008113) which has just been published at the USPTO for technology related to eatable RFID tags.
Let's check the independent claims:

1. A system for monitoring ingestion of medicine comprising:
forming an antenna comprised of metal segments and said medicine;
forming a digestible radio frequency identification (RFID) tag comprised of at least one of said antennas;
ingesting said RFID tag; receiving signals and power from an external transmitter;
transmitting signals from said RFID tag to an external receiver; and monitoring a signal from said RFID tag.

6. A system for monitoring ingestion of medicine comprising:
coating particles of said medicine with a conductive material;
forming an antenna of said coated medicine forming a digestible radio frequency identification (RFID) tag comprised of at least one antenna;
ingesting said RFID tag; receiving signals and power from an external transmitter;
transmitting signals from said RFID tag to an external receiver;
monitoring a signal from said RFID tag; and wherein dissolution of said antenna indicates digestion of said medicine.

7. A digestible radio frequency identification (RFID) tag for monitoring ingestion of medicine comprising: an antenna comprised of said medicine and conductive segment; a circuit connected to said antenna; a resonant cavity connected to said circuit; and wherein said antenna is dissolved by digestion of said medicine.

You better check what you eat!