A spinal column fixation device includes a support member, a top seat fastened at the top end with the support member, and a bottom seat fastened at the bottom end with the support member. The top seat and the support member are fastened by an angle adjusting mechanism such that the angle between the...http://www.google.com.au/patents/US6730088?utm_source=gb-gplus-sharePatent US6730088 - Device for fixing spinal column under treatment
