Granted Patent
Utility
US 4,922,379 · App. 07/381,559
Power semiconductor package
Inventor:
Earl M. Estes, Jr.
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Jul 18, 1989
Inventor
Earl M. Estes, Jr.
Assignee (at issue)
Hughes Aircraft Company
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.