Granted Patent
Utility
US 4,960,381 · App. 07/231,653
Screw-type dental implant anchor
Inventor:
Gerald A. Niznick
Patented Case
View Patent ↗
Granted: Oct 2, 1990
Filed: Aug 10, 1988
Inventor
Gerald A. Niznick
Assignee (at issue)
Core-Vent Corporation
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.