Granted Patent
Utility
US 6,136,031 · App. 09/098,739
Artificial intervertebral disc
Inventor:
Lance Middleton
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Jun 17, 1998
Inventor
Lance Middleton
Assignee (at issue)
Surgical Dynamics, 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.