Granted Patent
Utility
US 5,220,604 · App. 07/589,924
Method for performing group exclusion in hierarchical group structures
Inventors:
Morrie Gasser, Andrew C. Goldstein, Charles W. Kaufman
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Sep 28, 1990
Inventors
Morrie Gasser
Andrew C. Goldstein
Charles W. Kaufman
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.