Granted Patent
Utility
US 5,677,912 · App. 07/826,724
Diagnostic device for a communications switching system
Inventor:
Paul D. Smith
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Jan 28, 1992
Inventor
Paul D. Smith
Assignee (at issue)
Rockwell International Corporation
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.