Granted Patent
Utility
US 6,724,304 · App. 10/229,796
Security entrance system
Inventor:
Alan J. Risi
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Aug 28, 2002
Inventor
Alan J. Risi
Assignee (at issue)
Georal International Ltd.
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.