Granted Patent
Utility
US 4,454,481 · App. 06/354,840
Shielded amplifier
Inventor:
Harold F. Lewis
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Mar 4, 1982
Inventor
Harold F. Lewis
Assignee (at issue)
Rockwell International 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.