Granted Patent
Utility
US 4,015,817 · App. 05/550,290
Stop means for valves
Inventors:
Pericles A. Argyris, William R. Williams
Patented Case
View Patent ↗
Granted: Apr 5, 1977
Filed: Feb 18, 1975
Inventors
Pericles A. Argyris
William R. Williams
Assignee (at issue)
Rockwell International 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.