Granted Patent
Utility
US 4,821,179 · App. 06/763,636
Communication system configuration detection apparatus and method
Inventors:
Craig W. Jensen, Frederick R. Keller, Joel Morrow, Eric Anthony Roth
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Aug 8, 1985
Inventors
Craig W. Jensen
Frederick R. Keller
Joel Morrow
Eric Anthony Roth
Assignees (at issue)
American Telephone and Telegraph, Co.
AT&T Information Systems 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.