Granted Patent
Utility
US 4,393,578 · App. 06/360,548
Method of making silicon-on-sapphire FET
Inventors:
William R. Cady, SePuan Yu, John R. Eshbach, Jr.
Patented Case
View Patent ↗
Granted: Jul 19, 1983
Filed: Mar 22, 1982
Inventors
William R. Cady
SePuan Yu
John R. Eshbach, Jr.
Assignee (at issue)
General Electric 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.