Granted Patent
Utility
US 6,801,607 · App. 09/850,708
System and method for preventing fraudulent calls using a common billing number
Inventors:
Dean C. Marchand, Erin C. Jackman, Ron Zimmerman
Patented Case
View Patent ↗
Granted: Oct 5, 2004
Filed: May 8, 2001
Inventors
Dean C. Marchand
Erin C. Jackman
Ron Zimmerman
Assignee (at issue)
MCI, 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.