Granted Patent
Utility
US 5,931,672 · App. 08/878,995
Drive mechanism for oscillatory dental tool
Inventors:
Robert T. Postal, Michael E Langlais
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Jun 19, 1997
Inventors
Robert T. Postal
Michael E Langlais
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.