Granted Patent
Utility
US 5,609,636 · App. 08/585,297
Spinal implant
Inventors:
Douglas W. Kohrs, Hansen Yuan, David W. Stassen
Patented Case
View Patent ↗
Granted: Mar 11, 1997
Filed: Jan 11, 1996
Inventors
Douglas W. Kohrs
Hansen Yuan
David W. Stassen
Assignee (at issue)
Spin Tech, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.