Granted Patent
Utility
US 6,256,497 · App. 09/046,673
Interworking between telecommunications networks
Inventor:
Paul Chambers
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Mar 24, 1998
Inventor
Paul Chambers
Assignee (at issue)
ICO Services 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.