Granted Patent
Utility
US 5,467,745 · App. 08/306,272
System for determining the appropriate state of a flow control valve and controlling its state
Inventor:
Thomas J. Hollis
Patented Case
View Patent ↗
Granted: Nov 21, 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.