A device for interventional surgical or medical procedures is presented. The device is generally in the form of a balloon and is used to position itself or other working elements up against or through lumen walls in the body. The balloon is comprised of at least two materials of different elastic modulus,...http://www.google.com/patents/US7691080?utm_source=gb-gplus-sharePatent US7691080 - Dual modulus balloon for interventional procedures
