Granted Patent
Utility
US 6,249,575 · App. 09/210,347
Telephony security system
Inventors:
Craig Heilmann, Todd Beebe
Patented Case
View Patent ↗
Granted: Jun 19, 2001
Filed: Dec 11, 1998
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.