Granted Patent
Utility
US 6,595,231 · App. 09/868,056
Device and method for regulating the pressure of a gas stream
Inventor:
Ronald Best
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Aug 20, 2001
Inventor
Ronald Best
Assignee (at issue)
Varian, 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.