Granted Patent
Utility
US 6,700,490 · App. 10/104,829
Digital detection filters for electronic article surveillance
Inventor:
Thomas J. Frederick
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: Mar 22, 2002
Inventor
Thomas J. Frederick
Assignee (at issue)
Sensormatic Electronics, LLC
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.