Granted Patent
Utility
US 4,884,217 · App. 07/102,832
Expert system with three classes of rules
Inventors:
Richard D. Skeirik, Frank O. DeCaria
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Sep 30, 1987
Inventors
Richard D. Skeirik
Frank O. DeCaria
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.