Granted Patent
Utility
US 4,434,541 · App. 06/219,069
Electromagnetic shielding
Inventor:
Donald H. Powers
Patented Case
View Patent ↗
Granted: Mar 6, 1984
Filed: Dec 22, 1980
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.