Granted Patent
Utility
US 4,365,330 · App. 06/175,718
Channel zero switching arrangements for digital telecommunication exchanges
Inventors:
Geoffrey Chopping, Robert Moberly, Alexander S. Philip
Patented Case
View Patent ↗
Granted: Dec 21, 1982
Filed: Aug 6, 1980
Inventors
Geoffrey Chopping
Robert Moberly
Alexander S. Philip
Assignee (at issue)
The Plessey Company PLC
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.