Granted Patent
Utility
US 4,707,694 · App. 06/873,139
Telephone system port communication method and apparatus
Inventors:
David Bauer, Larry D. Bowyer, David Ruby, Richard A. Windhausen
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Jun 6, 1986
Inventors
David Bauer
Larry D. Bowyer
David Ruby
Richard A. Windhausen
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.