Granted Patent
Utility
US 5,380,200 · App. 08/148,888
Endodontic instrument of predetermined flexibility
Inventors:
Derek E. Heath, Carl J. Berendt
Patented Case
View Patent ↗
Granted: Jan 10, 1995
Filed: Oct 8, 1993
Inventors
Derek E. Heath
Carl J. Berendt
Assignee (at issue)
Quality Dental Products, 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.