Granted Patent
Utility
US 4,554,943 · App. 06/557,716
Single disc rotary valve
Inventors:
Robert L. Claney, Herbert H. Walton, Steven D. Kehoe, Kimball R. Barron
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Dec 2, 1983
Inventors
Robert L. Claney
Herbert H. Walton
Steven D. Kehoe
Kimball R. Barron
Assignee (at issue)
Fisher Controls International LLC
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.