Granted Patent
Utility
US 5,555,262 · App. 08/522,800
Transmission system of the synchronous digital hierarchy
Inventor:
Ralph Urbansky
Patented Case
View Patent ↗
Granted: Sep 10, 1996
Filed: Sep 1, 1995
Inventor
Ralph Urbansky
Assignee (at issue)
LUCENT TECHNOLOGIES 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.