Granted Patent
Utility
US 6,260,819 · App. 09/420,886
Locking valve
Inventor:
Vagan Ovsepyan
Patented Case
View Patent ↗
Granted: Jul 17, 2001
Filed: Oct 19, 1999
Inventor
Vagan Ovsepyan
Assignee (at issue)
Southern Spears Manufacturing Co.
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.