Granted Patent
Utility
US 4,855,999 · App. 07/118,979
DTDM multiplexer with cross-point switch
Inventor:
Hung-Hsiang Jonathan Chao
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Nov 10, 1987
Inventor
Hung-Hsiang Jonathan Chao
Assignee (at issue)
Bell Communications Research, 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.