Granted Patent
Utility
US 5,218,604 · App. 07/577,273
Dual-hubbed arrangement to provide a protected ring interconnection
Inventor:
Joseph Sosnosky
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Aug 31, 1990
Inventor
Joseph Sosnosky
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.