vertebral stabilizationUS8641734Apr 29, 2009Feb 4, 2014DePuy Synthes Products, LLCDual spring posterior dynamic stabilization device with elongation limiting elastomersUS8652175Dec 31, 2004Feb 18, 2014Rachiotek, LlcSurgical implant devices and systems including a sheath memberUS8668719Mar 30, 2010Mar 11, 2014Simpirica Spine, Inc.Methods and apparatus for improving shear loading capacity of a spin