Granted Patent
Utility
US 5,128,824 · App. 07/658,211
Directionally vented underground distribution surge arrester
Inventors:
Harry George Yaworski, Alan D. Borgstrom
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Feb 20, 1991
Inventors
Harry George Yaworski
Alan D. Borgstrom
Assignee (at issue)
ARTERICA 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.