Robert Snell,Geoffrey Thomas Andrews,Martin Cable,Scott Johnson
申请号：
US11505633
公开号：
US08882837B2
申请日:
2006.08.17
申请国别(地区):
US
年份:
2014
代理人:
摘要：
A process for making a polymeric product having a gradual variation in modulus through at least a portion of the product is disclosed together with an artificial spinal disc formed using the process.
