A multi-wall expandable device (40) that optionally can have at least one material (46) between, Outside, or inside m the walls (43, 44) of the device. The sheet of material can be solid, perforated, or strands. Alternatively, individual strand or strands (47) of material may be woven through structural...http://www.google.de/patents/US20080140172?utm_source=gb-gplus-sharePatent US20080140172 - Multi-Wall Expandable Device Capable Of Drug Delivery Related Applications
