Granted Patent
Utility
US 5,463,986 · App. 08/306,281
Hydraulically operated restrictor/shutoff flow control valve
Inventor:
Thomas J. Hollis
Patented Case
View Patent ↗
Granted: Nov 7, 1995
Filed: Sep 14, 1994
Inventor
Thomas J. Hollis
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.