Granted Patent
Utility
US 6,743,256 · App. 09/976,685
Graftless spinal fusion device
Inventor:
Michael D. Mason
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Oct 11, 2001
Inventor
Michael D. Mason
Assignee (at issue)
Michael D. Mason
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.