Granted Patent
Utility
US 4,159,468 · App. 05/852,446
Communications line authentication device
Inventors:
Vera L. Barnes, Thomas J. Dodds, Jr., Harold F. Gibson, Carl M. Campbell
Patented Case
View Patent ↗
Granted: Jun 26, 1979
Filed: Nov 17, 1977
Inventors
Vera L. Barnes
Thomas J. Dodds, Jr.
Harold F. Gibson
Carl M. Campbell
Assignee (at issue)
Burroughs, Inc.
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.