Granted Patent
Utility
US 4,429,991 · App. 06/293,067
Method for detecting physical anomalies of U.S. currency
Inventor:
Charles J. Williams
Patented Case
View Patent ↗
Granted: Feb 7, 1984
Filed: Aug 17, 1981
Inventor
Charles J. Williams
Assignee (at issue)
PerkinElmer, 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.