Granted Patent
Utility
US 4,744,048 · App. 06/785,843
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Inventors:
David Blanset, David A. Butterfield, Kenneth M. Keverian, Charles S. Kline, Gerald Popek
Patented Case
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Granted: May 10, 1988
Filed: Oct 9, 1985
Inventors
David Blanset
David A. Butterfield
Kenneth M. Keverian
Charles S. Kline
Gerald Popek
Assignees (at issue)
American Telephone and Telegraph, Co.
AT&T Information Systems Inc.
Locus Computing 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.