Devices, systems and methods for dynamically stabilizing the spine are provided. The devices include a radially expandable spacer having an undeployed configuration and a deployed configuration, wherein the spacer has axial and radial dimensions for positioning between the spinous processes of adjacent...http://www.google.com/patents/US8012207?utm_source=gb-gplus-sharePatent US8012207 - Systems and methods for posterior dynamic stabilization of the spine
