Granted Patent
Utility
US 5,987,113 · App. 08/773,521
Long distance phone tag service
Inventor:
Daniel James
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Dec 23, 1996
Inventor
Daniel James
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.