Granted Patent
Utility
US 5,735,689 · App. 08/570,642
Endodontic dental instrument
Inventor:
John T. McSpadden
Patented Case
View Patent ↗
Granted: Apr 7, 1998
Filed: Dec 11, 1995
Inventor
John T. McSpadden
Assignee (at issue)
Tycom Dental 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.