Granted Patent
Utility
US 5,734,721 · App. 08/542,052
Anti-spoof without error extension (ANSWER)
Inventor:
James M. Clark
Patented Case
View Patent ↗
Granted: Mar 31, 1998
Filed: Oct 12, 1995
Inventor
James M. Clark
Assignee (at issue)
ITT 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.