Granted Patent
Utility
US 6,760,421 · App. 10/035,639
Telephony security system
Inventors:
Craig Heilmann, Todd Beebe
Patented Case
View Patent ↗
Granted: Jul 6, 2004
Filed: Oct 19, 2001
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.