Granted Patent
Utility
US 5,524,670 · App. 08/328,579
Automatic flow control valve
Inventor:
Robert W. Castle
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Oct 21, 1994
Inventor
Robert W. Castle
Assignee (at issue)
TACO, 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.