Granted Patent
Utility
US 4,058,672 · App. 05/740,681
Packet-switched data communications system
Inventors:
William C. Crager, Sudhindra R. Umarji, Robert H. Griffin, Gerard J. Louit
Patented Case
View Patent ↗
Granted: Nov 15, 1977
Filed: Nov 10, 1976
Inventors
William C. Crager
Sudhindra R. Umarji
Robert H. Griffin
Gerard J. Louit
Assignee (at issue)
International Telephone and Telegraph 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.