Granted Patent
Utility
US 4,629,161 · App. 06/729,622
Gate valve
Inventors:
Taylor L. Jones, Paul D. Bunch, Russell Stevens
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: May 2, 1985
Inventors
Taylor L. Jones
Paul D. Bunch
Russell Stevens
Assignee (at issue)
Cameron Iron Works, Inc.
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.