Granted Patent
Utility
US 5,535,986 · App. 08/491,360
Torsionallly loaded fluid seals for rotary valves
Inventors:
Wilbur Dean Hutchens, Timothy A. McMahon, Brian Nolan, Steven M. Kirk, Paul R. Hunsberger, Jr.
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: Jun 30, 1995
Inventors
Wilbur Dean Hutchens
Timothy A. McMahon
Brian Nolan
Steven M. Kirk
Paul R. Hunsberger, Jr.
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.