Granted Patent
Utility
US 5,179,552 · App. 07/821,264
Crosspoint matrix switching element for a packet switch
Inventor:
Hung-Hsiang Jonathan Chao
Patented Case
View Patent ↗
Granted: Jan 12, 1993
Filed: Jan 10, 1992
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.