Granted Patent
Utility
US 5,288,231 · App. 08/027,785
Light shield for dental apparatus
Inventors:
Paul Kuehn, Thomas A. Lansing
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Mar 8, 1993
Inventors
Paul Kuehn
Thomas A. Lansing
Assignee (at issue)
Pinnacle Products Group, Ltd.
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.