Granted Patent
Utility
US 6,571,825 · App. 09/866,522
Rotary valve
Inventor:
Peter Stacy
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: May 25, 2001
Inventor
Peter Stacy
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.