Granted Patent
Utility
US 4,438,365 · App. 06/348,640
Spark gap for line transient protection
Inventor:
Paul Atkinson
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Feb 16, 1982
Inventor
Paul Atkinson
Assignee (at issue)
Zenith Radio Corporation
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.