Granted Patent
Utility
US 6,247,931 · App. 09/288,764
Drive mechanism for oscillatory dental tool
Inventors:
Robert T. Postal, John R. Laverack, George E. Riehm, Edward Gilchrest, Tom Benz, Robert P. Wallace
Patented Case
View Patent ↗
Granted: Jun 19, 2001
Filed: Apr 8, 1999
Inventors
Robert T. Postal
John R. Laverack
George E. Riehm
Edward Gilchrest
Tom Benz
Robert P. Wallace
Assignee (at issue)
Twist2It, 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.