Granted Patent
Utility
US 4,311,882 · App. 06/110,565
Method of and arrangement for testing traffic routes in telecommunication networks
Inventors:
Wilfried Johner, Willy R. Haerry, Paul A. Heman
Patented Case
View Patent ↗
Granted: Jan 19, 1982
Filed: Jan 7, 1980
Inventors
Wilfried Johner
Willy R. Haerry
Paul A. Heman
Assignee (at issue)
International Standard Electric 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.