Granted Patent
Utility
US 4,876,717 · App. 07/205,054
Adjunct processor for providing computer facility access protection via call transfer
Inventors:
Salvador Barron, James E. Coffman
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Jun 3, 1988
Inventors
Salvador Barron
James E. Coffman
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.