Robert Snell,Geoffrey Andrews,Martin Cable,Scott Johnson
申请号：
US10530919
公开号：
US08353960B2
申请日:
2003.10.08
申请国别(地区):
US
年份:
2013
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.
