Granted Patent
Utility
US 4,667,321 · App. 06/551,278
Input-output multiplexer-demultiplexer communications channel
Inventor:
William R. Goodman
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Nov 14, 1983
Inventor
William R. Goodman
Assignee (at issue)
Tandem Computers Incorporated
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.