Granted Patent
Utility
US 6,623,525 · App. 10/223,148
Porous intervertebral distraction spacers
Inventors:
James D. Ralph, Stephen Tatar, Thomas J. Errico
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Oct 4, 2002
Inventors
James D. Ralph
Stephen Tatar
Thomas J. Errico
Assignee (at issue)
SpineCore, 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.