Granted Patent
Utility
US 5,136,455 · App. 07/494,535
Electromagnetic interference suppression device
Inventor:
Richard J. Billingsley
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Mar 16, 1990
Inventor
Richard J. Billingsley
Assignee (at issue)
ESP Electronic Systems Protection, 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.