Methods and devices are described for modifying tissue in a spine of a patient to treat or alleviate spinal stenosis. In one embodiment, a method may include: advancing at least a distal portion of an elongate tissue modification device into an epidural space and between target tissue and non-target...http://www.google.se/patents/US8048080?utm_source=gb-gplus-sharePatent US8048080 - Flexible tissue rasp
