Granted Patent
Utility
US 4,730,281 · App. 06/712,556
Data processing filtering method and apparatus
Inventors:
Paul F. Rodney, Richard A. Kester
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Mar 15, 1985
Inventors
Paul F. Rodney
Richard A. Kester
Assignee (at issue)
NL Industries, Inc.
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.