Granted Patent
Utility
US 6,728,089 · App. 10/040,704
Surge suppressor for wide range of input voltages
Inventor:
Jack R. Harford
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Nov 1, 2001
Inventor
Jack R. Harford
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.