Granted Patent
Utility
US 4,590,593 · App. 06/509,487
Electronic noise filtering system
Inventor:
Paul F. Rodney
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Jun 30, 1983
Inventor
Paul F. Rodney
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.