Granted Patent
Utility
US 6,256,512 · App. 09/221,382
Mobile access to a PBX via a TLDN
Inventor:
Timothy C. Verdonk
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Dec 28, 1998
Inventor
Timothy C. Verdonk
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.