Granted Patent
Utility
US 4,920,499 · App. 07/103,050
Expert system with natural-language rule updating
Inventor:
Richard D. Skeirik
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: Sep 30, 1987
Inventor
Richard D. Skeirik
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.