Granted Patent
Utility
US 5,970,977 · App. 08/950,450
Demand regulator having adjustable air flow
Inventor:
Dennis H. Sattelberg
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Oct 15, 1997
Inventor
Dennis H. Sattelberg
Assignee (at issue)
HARSCO TECHNOLOGIES LLC
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.