Granted Patent
Utility
US 6,820,857 · App. 10/065,667
Needle valve with soft tip stem
Inventor:
Michael F. Lancaster
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Nov 7, 2002
Inventor
Michael F. Lancaster
Assignee (at issue)
Noshok, Inc.
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.