Granted Patent
Utility
US 5,014,031 · App. 07/382,943
Ultra precision pressure regulator
Inventor:
Heinz Nusser
Patented Case
View Patent ↗
Granted: May 7, 1991
Filed: Jul 21, 1989
Inventor
Heinz Nusser
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.