Granted Patent
Utility
US 6,206,691 · App. 09/411,919
System and methods for analyzing tooth shades
Inventors:
Maryann Lehmann, Perry Youngs, Curtis A. Vock
Patented Case
View Patent ↗
Granted: Mar 27, 2001
Filed: Oct 4, 1999
Inventors
Maryann Lehmann
Perry Youngs
Curtis A. Vock
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.