Granted Patent
Utility
US 4,770,004 · App. 06/873,898
Cryogenic thermal switch
Inventor:
George P. Lagodmos
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Jun 13, 1986
Inventor
George P. Lagodmos
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.