Granted Patent
Utility
US 4,769,280 · App. 06/688,580
Electromagnetic shielding
Inventor:
Donald H. Powers
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Jan 3, 1985
Inventor
Donald H. Powers
Assignee (at issue)
Chomerics, 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.