Granted Patent
Utility
US 4,967,787 · App. 07/474,979
Unitized disc flow control assembly for a restrictor valve
Inventor:
Julian S. Taylor
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Feb 5, 1990
Inventor
Julian S. Taylor
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.