Granted Patent
Utility
US 5,041,972 · App. 07/181,784
Method of measuring and evaluating consumer response for the development of consumer products
Inventor:
W. Alan Frost
Patented Case
View Patent ↗
Granted: Aug 20, 1991
Filed: Apr 15, 1988
Inventor
W. Alan Frost
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.