Granted Patent
Utility
US 6,832,913 · App. 10/407,165
Tooth shade analyzer system and methods
Inventor:
Maryann Lehmann
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Apr 7, 2003
Inventor
Maryann Lehmann
Assignee (at issue)
Shade Analyzing Technologies, 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.