Granted Patent
Utility
US 6,309,420 · App. 08/950,256
Enhanced visibility materials for implantation in hard tissue
Inventor:
Howard E. Preissman
Patented Case
View Patent ↗
Granted: Oct 30, 2001
Filed: Oct 14, 1997
Inventor
Howard E. Preissman
Assignee (at issue)
Parallax Medical, 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.