Implantable medical devices are provided for controlled release of drugs. In one embodiment, the device comprises a support structure; two or more discrete reservoirs provided in spaced positions across at least one surface of the support structure; and a release system loaded in each of the reservoirs,...http://www.google.co.uk/patents/US7918842?utm_source=gb-gplus-sharePatent US7918842 - Medical device with controlled reservoir opening
