Granted Patent
Utility
US 5,123,021 · App. 07/568,039
Message routing check system
Inventors:
Richard John Proctor, Geoffrey Chopping, Thomas S. Maddern
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Aug 16, 1990
Inventors
Richard John Proctor
Geoffrey Chopping
Thomas S. Maddern
Assignee (at issue)
GEC Plessey Telecommunication 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.