Granted Patent
Utility
US 4,731,785 · App. 06/876,613
Combined circuit switch and packet switching system
Inventors:
James J. Ferenc, Robert William Gebhardt, Gary J. Grimes, Edward B. Morgan, Gabe A. Sellers, III
Patented Case
View Patent ↗
Granted: Mar 15, 1988
Filed: Jun 20, 1986
Inventors
James J. Ferenc
Robert William Gebhardt
Gary J. Grimes
Edward B. Morgan
Gabe A. Sellers, III
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.