Granted Patent
Utility
US 5,315,657 · App. 07/589,923
Compound principals in access control lists
Inventors:
Martin Abadi, Andrew C. Goldstein, Butler W. Lampson
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: Sep 28, 1990
Inventors
Martin Abadi
Andrew C. Goldstein
Butler W. Lampson
Assignee (at issue)
Digital Equipment 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.