Granted Patent
Utility
US 6,189,563 · App. 09/356,867
Electronic pressure control pilot operated relief valve
Inventor:
Julian S. Taylor
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Jul 15, 1999
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.