Granted Patent
Utility
US 4,736,766 · App. 07/028,876
Flow shut-off valve
Inventors:
Leeland M. Bathrick, Laddie F. Dobbs
Patented Case
View Patent ↗
Granted: Apr 12, 1988
Filed: Mar 24, 1987
Inventors
Leeland M. Bathrick
Laddie F. Dobbs
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.