An expandable spinal implant including at least two expandable branch portions extending generally along a longitudinal axis and each including a fixed end portion and an opposite movable end portion with the fixed end portions coupled together adjacent a base portion of the implant. A first of the branch...http://www.google.de/patents/US7678148?utm_source=gb-gplus-sharePatent US7678148 - Expandable spinal implant having interlocking geometry for structural support
