Granted Patent
Utility
US 4,307,378 · App. 06/104,965
Four-wire speed independent selector switch for digital communication networks
Inventor:
Becky J. Clark
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Dec 18, 1979
Inventor
Becky J. Clark
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.