Granted Patent
Utility
US 5,653,421 · App. 08/677,017
Fluid switch
Inventor:
Steven J. Ellzey
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Jul 8, 1996
Inventor
Steven J. Ellzey
Assignee (at issue)
Lockheed Martin Vought Systems Corp.
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.