Granted Patent
Utility
US 6,468,310 · App. 09/906,117
Intervertebral spacer device having a wave washer force restoring element
Inventors:
James D. Ralph, Steven Tatar, Joseph P. Errico
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Jul 16, 2001
Inventors
James D. Ralph
Steven Tatar
Joseph P. Errico
Assignee (at issue)
THIRD MILLENNIUM ENGINEERING
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.