Granted Patent
Utility
US 5,173,939 · App. 07/783,361
Access control subsystem and method for distributed computer system using compound principals
Inventors:
Martin Abadi, Michael Burrows, Edward P. Wobber
Patented Case
View Patent ↗
Granted: Dec 22, 1992
Filed: Oct 28, 1991
Inventors
Martin Abadi
Michael Burrows
Edward P. Wobber
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.