US Patent 7630771 - Implantable microtransponder

http://www.freepatentsonline.com/7630771.html

A variety of implantable medical devices exist to treat neurological disorders but the requirements of external communication and biocompatibility can limit the effectiveness and lifespan of such devices. This patent from MicroTransponder Inc. teaches a wireless neurotransmitter which may help solve these problems. Claim 1 reads:

1. An implantable medical device comprising:

a body member comprising a biocompatible material;

a wireless transponder enclosed by the body member; and

grooves extending along the body member, wherein the grooves contain at least one electrode adapted to electrically interface the body member with the cellular matter growing along the body member.