Granted Patent
Utility
US 4,516,216 · App. 06/376,741
In-service monitoring system for data communications network
Inventor:
Thomas R. Armstrong
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: May 10, 1982
Inventor
Thomas R. Armstrong
Assignee (at issue)
PARADYNE CORPORATION
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.