Granted Patent
Utility
US 6,005,859 · App. 08/781,943
Proxy VAT-PSTN origination
Inventors:
Joseph C. Harvell, Gregory T. Stovall
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Dec 19, 1996
Inventors
Joseph C. Harvell
Gregory T. Stovall
Assignee (at issue)
Nortel Networks Limited
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.