Granted Patent
Utility
US 6,783,113 · App. 10/222,599
Quarter-turn valve
Inventor:
Alfred Stephen Schommer
Patented Case
View Patent ↗
Granted: Aug 31, 2004
Filed: Aug 15, 2002
Inventor
Alfred Stephen Schommer
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.