Granted Patent
Utility
US 6,320,948 · App. 09/593,888
Telephony security system
Inventors:
Craig Heilmann, Todd Beebe
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Jun 14, 2000
Inventors
Craig Heilmann
Todd Beebe
Assignee (at issue)
SecureLogix Corporation
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.