Granted Patent
Utility
US 4,477,056 · App. 06/470,810
High force-gain valve
Inventor:
Richard C. Alexius
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Feb 28, 1983
Inventor
Richard C. Alexius
Assignee (at issue)
LOCKHEED MARTIN 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.