Granted Patent
Utility
US 5,524,863 · App. 08/257,104
Quarter turn rotatable flow control valve
Inventor:
Ronald W. Davis
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Jun 8, 1994
Inventor
Ronald W. Davis
Assignee (at issue)
Daniel Industries, 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.