Granted Patent
Utility
US 5,902,106 · App. 09/056,251
Endodontic dental instrument
Inventor:
John T. McSpadden
Patented Case
View Patent ↗
Granted: May 11, 1999
Filed: Apr 7, 1998
Inventor
John T. McSpadden
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.