Granted Patent
Utility
US 6,315,558 · App. 09/426,598
Method of manufacturing superelastic endodontic files and files made therefrom
Inventors:
Farrokh Farzin-Nia, William Otsen
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Oct 26, 1999
Inventors
Farrokh Farzin-Nia
William Otsen
Assignee (at issue)
Ormco 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.