Granted Patent
Utility
US 4,792,306 · App. 07/101,191
Instructional device for teaching dental X-ray techniques
Inventor:
Shannon S. Duplantis
Patented Case
View Patent ↗
Granted: Dec 20, 1988
Filed: Sep 25, 1987
Inventor
Shannon S. Duplantis
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.