Granted Patent
Utility
US 5,392,891 · App. 08/194,551
Apparatus and method for discriminating coins based on metal content
Inventors:
Christopher Ferguson, J. Scott Petty
Patented Case
View Patent ↗
Granted: Feb 28, 1995
Filed: Feb 10, 1994
Inventors
Christopher Ferguson
J. Scott Petty
Assignee (at issue)
Raytheon Company
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.