Granted Patent
Utility
US 4,630,632 · App. 06/674,742
Pressure regulator
Inventor:
John L. Johnson
Patented Case
View Patent ↗
Granted: Dec 23, 1986
Filed: Nov 26, 1984
Inventor
John L. Johnson
Assignee (at issue)
Schrader Bellows 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.