Granted Patent
Utility
US 4,586,486 · App. 06/628,290
Multilevel air distribution panel for air ventilation hood
Inventor:
Arnold S. Kaufman
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Jul 6, 1984
Inventor
Arnold S. Kaufman
Assignee (at issue)
National Air Systems, 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.